Common E-bike Battery Problems and How to Fix Them. Fiido electric bike battery

Fiido D21 Electric Bike: Foldable and Stylish with 417.6Wh Battery. Max Range of 100 KM, 3 Modes Switch, 120 Kg Payload, 20-inch Tires with LED Light, 24-Month Warranty

Experience the perfect fusion of simplicity and style with the Fiido D21 Folding Electric Bike. Crafted with care by Fiido’s ingenious designers, this bike showcases a sleek and modern design that effortlessly blends form and functionality. Its clean lines, minimalist aesthetics, and carefully chosen color palette create an eye-catching and visually appealing electric bike. The foldable design allows for easy storage and transportation, making it convenient for daily commutes or weekend adventures. Ride in style without compromising on performance as you enjoy the smooth and enjoyable experience offered by the Fiido D21.

Inside the box of the Fiido D21 Folding Electric Bike, you will find several essential items to enhance your riding experience and provide convenience.

  • Charger: The Fiido D21 electric bike comes with a dedicated charger for convenient battery recharging, ensuring you’re always ready for your next adventure.
  • Manual: A comprehensive assembly and user manual is included, providing detailed instructions for the proper setup, operation, and maintenance of the Fiido D21 electric bike.
  • Tools: The package includes a set of specialized tools tailored for the Fiido D21, assisting with assembly, adjustments, and maintenance tasks to keep your bike in optimal condition.
  • Fenders: Additionally, fenders are provided to protect against splashes from mud, water, or debris, ensuring a cleaner and more comfortable riding experience, particularly in wet or muddy conditions.
  • Timely delivery within 5 to 9 business days via DPD
  • Comprehensive 2-year warranty ensuring prompt assistance in case of bike issues. We facilitate the return to the manufacturer’s repair center or provide replacement parts as necessary.
  • Dedicated after-sales support available on weekdays, Monday to Friday
  • Klarna. Effortlessly manage your budget with the option to split any purchase into three interest-free payments. Available in supported countries based on your location: IE/FR/ES/IT/BE/AT/FI/NL/DE. For assistance with Klarna, please refer to our help page.
  • May SUPERDEALS DAY Exclusive offers and discounts available now!
  • Ready, Steady. Find the PERFECT Gift
  • Don’t miss out! Secure the best discount by making your purchase now!
  • Apply discount code: ‘Electric Future EU. OfficialScooter’ during checkout

Free Express Delivery

Delivery in 4 to 8 working days by DPD.(Free over €100)

After Sales Care

Dedicated after-sales support available on weekdays, Monday to Friday

Fully Tested Before Dispatch

We check everything is working as it should before we send out your order

24 Month Warranty

Comprehensive 2-year warranty ensuring prompt assistance in case of scooter issues. We facilitate the return to the manufacturer’s repair center or provide replacement parts as necessary

Urban-inspired Bicycle Design

Experience the ultimate mode of transport designed specifically for urban dwellers with the Fiido D21 Folding Electric Bike. This sleek and innovative electric bike allows you to effortlessly glide through the urban landscape, making your daily commutes or leisurely rides a breeze.

Navigating the bustling city streets becomes a seamless and enjoyable experience with the Fiido D21. Its agile and compact design enables you to maneuver through traffic with ease, effortlessly weaving your way from point A to point B. Whether you’re heading to the gym, office, or meeting friends at a restaurant, the Fiido D21 is the ideal companion for your urban adventures.

The Fiido D21 not only offers a convenient and efficient means of transportation but also ensures a smooth and comfortable ride. With its electric assistance, you can effortlessly conquer hilly terrains and cover longer distances without breaking a sweat. Say goodbye to the hassles of parking, traffic congestion, and public transportation delays, and embrace the freedom and flexibility of the Fiido D21.

This electric bike is designed with the needs of city dwellers in mind. Its foldable design allows for easy storage in compact spaces, making it perfect for apartments or offices with limited space. When not in use, simply fold the bike and conveniently store it until your next adventure.

Experience the convenience, style, and agility of the Fiido D21 Folding Electric Bike as you effortlessly navigate the urban landscape. Embrace the freedom of gliding through the city with ease and grace, reaching your destinations faster and with a sense of joy and excitement. Upgrade your daily commute and explore the city in a whole new way with the Fiido D21.

Efficient and Powerful 250W Motor

Experience the impressive power and efficiency of the Fiido D21’s 250W high-efficiency motor. Hidden within the 20-inch rear wheel, this brushless geared motor delivers a remarkable 35nm of torque, providing tremendous power despite its compact size and lightweight design.

The Fiido D21’s motor is a true workhorse, allowing you to conquer rugged and steep roads with ease. No matter the terrain or incline, the motor propels you forward effortlessly, ensuring a smooth and enjoyable ride. Its high-efficiency design minimizes energy consumption, allowing you to cover longer distances without worrying about draining the battery.

The combination of power and efficiency in the Fiido D21’s 250W motor sets it apart from the rest. It delivers a dynamic riding experience, allowing you to effortlessly navigate challenging terrains and conquer steep hills. Whether you’re commuting through the city or embarking on adventurous off-road trails, this motor ensures optimal performance and reliability.

Embrace the power and efficiency of the Fiido D21’s 250W high-efficiency motor as it propels you forward with ease. No longer will rugged or steep roads be a challenge, as this motor effortlessly overcomes obstacles while conserving energy. Enjoy a thrilling and efficient ride, knowing that the Fiido D21’s motor is designed to deliver exceptional performance and reliability

Conveniently Removable Seatpost Battery with Generous Capacity

Experience the convenience and versatility of the FIIDO D21 electric bike’s removable seatpost battery with a generous capacity. This innovative feature allows you to travel longer distances without worrying about running out of power.

The FIIDO D21’s modular design incorporates a 36V 11.6Ah removable battery, cleverly concealed within the seat tube. At first glance, the bike appears similar to an ordinary bicycle, but hidden within is a powerful battery that can provide an impressive range of up to 100KM in electric moped mode. This compact yet high-capacity battery ensures that you can go the distance, whether you’re commuting to work, running errands, or embarking on leisurely rides.

The removable nature of the battery offers added convenience. You have the freedom to easily detach the battery from the seat tube, allowing you to charge it anywhere and at any time. This flexibility means you can power up your battery at home, in the office, or even at a charging station during longer journeys.

With the FIIDO D21’s removable seatpost battery, you no longer need to worry about being limited by the availability of charging outlets. Simply detach the battery and charge it wherever is most convenient for you, ensuring that you’re always ready to hit the road with confidence.

Embrace the convenience and freedom provided by the FIIDO D21’s removable seatpost battery. Enjoy the flexibility to travel longer distances and charge your battery on your own terms, allowing you to embark on your electric biking adventures with peace of mind.

Seamless Integration of Seatpost and Taillight

Experience the thoughtful design and efficiency of the Fiido D21 electric bike, where every detail has been carefully considered. One prime example of this meticulous planning is the integration of the seatpost, which not only houses the battery but also incorporates the taillight.

This innovative integration of the seatpost serves multiple purposes. Firstly, it minimizes the number of separate parts on the bike, creating a sleek and streamlined aesthetic. By combining the battery and taillight into one component, the Fiido D21 achieves a clean and uncluttered look, enhancing the overall visual appeal of the electric bike.

Beyond aesthetics, this integration also maximizes efficiency. The seatpost design optimizes the use of space, allowing for the seamless integration of the battery and taillight without compromising on functionality. This Smart engineering ensures that the bike remains compact and lightweight, facilitating a smooth and nimble riding experience.

The inclusion of the taillight within the seatpost is a practical and safety-focused feature. It enhances visibility for both the rider and others on the road, ensuring that you can ride with confidence, particularly during low-light conditions or at night. The integrated taillight enhances overall safety by making your presence known to others, minimizing the risk of accidents and improving overall visibility on the road.

With the Fiido D21’s integrated seatpost design, you can enjoy the benefits of simplified construction, enhanced aesthetics, and improved safety. Experience the thoughtful and efficient integration of the battery and taillight, making the Fiido D21 electric bike a truly remarkable and well-rounded choice for your riding needs.

Smooth and Reliable Shimano 7-Speed Gear System

Experience the versatility and performance of the Shimano 7-speed gear system on the Fiido D21 electric bike. This high-quality gear system offers a smooth and reliable shifting experience, allowing you to effortlessly adjust your riding pace to suit different terrains and preferences.

With the Shimano 7-speed gear system, you have the flexibility to choose from three adjustable levels in moped mode. This feature enables you to customize your riding experience according to your desired level of assistance and effort. Whether you prefer a leisurely ride, a moderate pace, or a more sporty and exhilarating journey, the Fiido D21 has you covered.

The Shimano 7-speed gear system enhances the Fiido D21’s overall sports attributes, providing you with the ability to navigate various terrains and inclines with ease. It ensures optimal power transfer, allowing you to maintain a comfortable pedaling rhythm and efficiently tackle any challenges along your route.

One of the remarkable aspects of the Fiido D21 is that the motor is discreetly hidden, making it nearly imperceptible at first glance. This design choice prioritizes the overall aesthetics of the bike while maintaining its sleek appearance. You can ride with confidence, knowing that the powerful motor is there to support you without compromising the clean and streamlined look of the bike.

Embrace the benefits of the Shimano 7-speed gear system on the Fiido D21 electric bike, which caters to riders of all skill levels and riding styles. Find your perfect gear combination and enjoy a personalized riding experience that suits your preferences, whether you’re exploring the city streets or venturing off-road. The Fiido D21’s exceptional performance and hidden motor create a truly remarkable electric biking experience.

Compact Size, Powerful Performance: High-Power Motor

Discover the exceptional power and compactness of the Fiido D21’s hidden 250W brushless gear motor, cleverly concealed within the 20-inch rear wheel. This innovative motor design offers an impressive combination of performance, efficiency, and aesthetic appeal.

Despite its compact size and lightweight construction, the 250W brushless gear motor packs a punch when it comes to torque. It delivers ample power to conquer challenging slopes and hills with ease, making your rides smoother and more enjoyable. What sets this motor apart is its ability to provide greater torque while consuming lower energy, ensuring a more efficient and sustainable riding experience.

The Fiido D21 electric bike not only excels in performance but also boasts a unique and eye-catching design. Its aesthetics strike a perfect balance between form and function, showcasing a harmonious blend of style and practicality. The sleek lines, well-thought-out proportions, and attention to detail create a visually stunning electric bike that stands out from the crowd.

Every aspect of the Fiido D21’s design has been carefully considered to ensure both functionality and aesthetics. From the hidden motor in the rear wheel to the overall balance of the bike, it embodies a harmonious fusion of form and function. This unique design enhances the overall riding experience, elevating it to a new level of enjoyment and satisfaction.

Experience the Fiido D21’s unique blend of power, efficiency, and captivating design. Enjoy the benefits of a compact and lightweight motor that delivers exceptional performance, all while enhancing the overall aesthetics of the electric bike. Immerse yourself in the beauty of this well-crafted machine that effortlessly combines style with functionality.

Sturdy and Reliable: Solid Design for the Fiido D21 Electric Bike

Experience the reliability and durability of the Fiido D21 Electric Bike, featuring a solid aluminum alloy frame that exudes a sense of sturdiness and dependability. This robust frame provides a stable and secure foundation for your rides, ensuring a confident and comfortable cycling experience.

To enhance your riding comfort, the Fiido D21 is equipped with an adjustable seat that can be easily customized to fit your preferred riding position. The addition of a spring saddle further absorbs shocks and vibrations, delivering a smooth and bump-free ride even on uneven surfaces. This makes the bike ideal for long city journeys and urban expeditions where comfort is paramount.

For added convenience, the Fiido D21 comes with a back frame that allows you to carry your gym gear, shopping items, or work equipment effortlessly. The sturdy back frame provides a secure attachment point, enabling you to transport your belongings with ease and convenience.

Safety is a top priority with the Fiido D21 Electric Bike. The pair of 20″ wear-resistant tires with grippy tread ensure optimal traction, keeping you firmly connected to the road and providing excellent stability. You can confidently take corners with ease, knowing that the tires offer reliable grip and control.

To ensure safe and responsive braking, the Fiido D21 is equipped with front and back disc brakes. These brakes deliver reliable stopping power, even in wet or challenging conditions. With the ability to stop quickly and effectively, you can navigate through traffic or unexpected situations with confidence and peace of mind.

Additionally, the Fiido D21 prioritizes visibility and safety during nighttime riding. The powerful and bright LED front light illuminates your path, while the flashing rear red light and red brake lights ensure that you are fully seen by other road users. This comprehensive lighting system enhances your visibility and helps to prevent accidents, ensuring a safer riding experience.

Embrace the solid and reliable design of the Fiido D21 Electric Bike, where every feature is thoughtfully engineered to provide you with a comfortable, safe, and enjoyable ride. From the sturdy frame to the convenient back frame, wear-resistant tires, responsive brakes, and comprehensive lighting system, this electric bike is designed to exceed your expectations and enhance your cycling adventures.

Unleash Your Adventure: Long-Range Capabilities of the Fiido D21 Electric Bike

Embark on limitless adventures with the Fiido D21 Electric Bike, boasting an outstanding long-range capability that sets it apart from the rest. This commuter cycle is equipped with a remarkable 36V 11.6Ah battery, allowing you to travel up to an impressive 100 Km on a single charge in moped mode. Whether you choose to utilize pedal assist or let the bike do the work for you, this extensive range ensures that you can enjoy a full week of riding on just one charge.

Designed to accommodate various riding preferences and styles, the Fiido D21 is perfect for city excursions or thrilling adventures. If you desire a bit of exercise, engage pedal assist to amplify your pedaling power and extend the range even further. Alternatively, for effortless cruising, rely on the bike’s electric power to propel you forward. With this versatility, you can customize your ride experience to suit your mood and energy level.

Not only does the Fiido D21 excel in range, but it also conquers hills with ease. Featuring a 25-degree climb angle, this electric bike effortlessly tackles steep inclines, ensuring a smooth and efficient ascent. Hills will no longer be an obstacle, allowing you to explore new routes and take on challenging terrains without hesitation.

The Fiido D21 is the ultimate companion for both city dwellers and adventurers alike. Its remarkable range, combined with its ability to handle hilly landscapes, guarantees a thrilling and reliable riding experience. Whether you’re embarking on city excursions, running errands, or indulging in memorable outdoor adventures, the Fiido D21 is your trusted companion, providing you with the freedom to explore and enjoy the ride to the fullest.

Specifications of the Fiido D21 Folding Electric Bike

  • Type: Adult Foldable Electric Bike
  • Colour: Bronze
  • Material: Aluminum alloy
  • Max Speed: 25 km/h
  • Max Range: 100 km (62 miles) depending on pure electric vs pedal-assist riding
  • Max Load Bearing: 120 kg / 264 lb
  • Gradeability: 25°
  • Motor Power: 250W
  • Motor Voltage: 36V
  • Battery: 36V 11.6 Ah
  • Charging Time: 6. 7 hours
  • Waterproof Rating: IPX4
  • Braking System: Front rear disc brake
  • Saddle Height: 81 cm – 124 cm
  • Extras: LED display with battery meter and PAS level indicator, front and rear LED lights, 3 PAS speed settings, electric horn, Smartphone holder with USB charger, rear rack
  • Tyres: 20″ x 1.75″
  • Unfolded Dimensions: 148 cm x 57 cm x 110 cm
  • Folded Dimensions: 80 cm x 40 cm x 74 cm
  • Weight: 17.5 kg


Experience a hassle-free delivery process with the FIIDO D21 electric bike. Your order will be delivered within 4 to 8 working days by DPD, a reliable and trusted courier service. Once your electric bike is dispatched, we will send you a delivery confirmation email that includes the tracking number and courier details. With this information, you can easily track your package throughout its entire journey, ensuring peace of mind and transparency.

To keep you informed every step of the way, we will also send you timely updates via email about the progress of your delivery. These updates will provide you with real-time information, allowing you to stay up-to-date on the whereabouts of your FIIDO D21 electric bike. We understand the importance of knowing the status of your order, and our aim is to provide you with a smooth and transparent delivery experience.

Rest assured that we value your satisfaction and strive to provide you with the best possible customer service. From the moment you place your order to the moment your FIIDO D21 electric bike arrives at your doorstep, we aim to keep you informed and ensure a seamless delivery process.

What is the refund policy?

At Electric Future, we take pride in providing our customers with a 30-day return and refund policy for the FIIDO D21 electric bike. We understand that your satisfaction is paramount, and we want to ensure that you are completely happy with your purchase. If for any reason you are not satisfied with your electric bike, you have the option to return it within 30 days of the purchase date.

To initiate a return, please ensure that the item is in its original condition, including the original packaging. The bike should be carefully repackaged in the original box to ensure its safe return. This ensures that the bike is protected during transit and minimizes the risk of damage.

Once we receive the returned item and verify that it is in its original condition, we will proceed with the refund process. Please note that the refund will be issued in accordance with our refund policy, and it may take a few business days for the refund to be processed and reflected in your account.

We value your satisfaction and want to make the return and refund process as convenient as possible for you. If you have any questions or concerns regarding the return process or our refund policy, please don’t hesitate to reach out to our customer support team. We are here to assist you and ensure that your experience with Electric Future is a positive one.

At Electric Future, we stand behind the quality and durability of our products. That’s why the FIIDO D21 Electric Bike comes with a comprehensive 2-year manufacturer warranty. This warranty provides you with peace of mind, knowing that we will take care of any manufacturing defects that may arise during this period.

In the unlikely event that your electric bike develops a fault covered by the warranty, we are here to assist you. We will promptly send out replacement parts for the motor, computer, mudguard, and battery, ensuring that your bike is up and running smoothly again. Please note that the warranty does not cover accidental damage or general wear and tear, as these are considered normal usage conditions.

It’s important to understand that the manufacturer warranty is different from insurance. While the warranty covers manufacturing defects and related issues, it does not provide coverage for accidental damage or theft. If you are concerned about these aspects, we recommend considering additional insurance coverage for your electric bike.

To ensure a smooth and hassle-free warranty claim process, we kindly request that you keep the original box in which your FIIDO D21 Electric Bike was delivered. This is essential as the courier will not accept the return of the bike without proper packaging. Keeping the original box will allow for the safe transport of the bike in case it needs to be returned or serviced.

At Electric Future, we are committed to providing excellent customer service and ensuring that you have a positive experience with our products. Should you have any questions or concerns regarding the warranty or any other aspect of your FIIDO D21 Electric Bike, please don’t hesitate to contact our dedicated customer support team. We are here to assist you and address any inquiries you may have.

How do i Pay Later with Klarna?

  • Add the desired item to your cart: Start by selecting the item you wish to purchase and add it to your shopping cart.
  • Proceed to checkout: Once you have finished selecting your items, proceed to the checkout page.
  • Fill out your details: On the checkout page, you will be prompted to fill out your personal and shipping information. Provide accurate and complete details to ensure a smooth transaction.
  • Select Klarna as the payment method: After filling out your information, you will be directed to the payment page. Here, you will find various payment options available. Look for and select the Klarna payment option.
  • Complete your order: Once you have selected Klarna as your preferred payment method, review your order details to ensure accuracy. If everything looks good, proceed to complete your order.

By choosing Klarna as your payment method, you can enjoy the convenience of splitting your purchase into multiple interest-free payments. Klarna offers flexibility and ease, allowing you to manage your budget effectively.

If you have any further questions or need assistance with the payment process, our customer support team is available to help.

Before purchasing the FIIDO D21 Electric Bike, we kindly advise you to familiarize yourself with the local laws and regulations regarding electric bikes in your country or region. In most of Europe, electric bikes are legal and can be used for commuting and recreational purposes. However, it’s always important to check and comply with the specific laws and requirements in your area.

For example, in Germany, the use of motor-powered vehicles, including electric bikes, requires an ABE certificate. It’s crucial to note that the FIIDO D21 Electric Bike does not have an ABE certificate. Therefore, if you are in Germany and decide to purchase this bike, it’s essential to understand that you will be responsible for complying with the local laws and regulations regarding its usage.

common, e-bike, battery, problems

In Germany, riding electric bikes is generally permitted on non-main roads, unmanaged trails, and private land, subject to local laws and restrictions. However, it’s important to adhere to the specific rules and guidelines set by your local authorities.

We would like to emphasize that once you make the payment for the FIIDO D21 Electric Bike, you automatically agree to the sales regulations of our store. Due to the lack of an ABE certificate, the bike cannot be refunded. Therefore, we urge you to carefully consider your decision and ensure that you are willing to take responsibility for the bike’s usage and compliance with local regulations.

common, e-bike, battery, problems

If you have any further questions or concerns regarding the legal aspects of using the FIIDO D21 Electric Bike in your country or region, we recommend consulting the relevant local authorities or seeking legal advice. Our team is available to provide any additional information or clarification you may need to make an informed decision.

Please note that it is your responsibility to ensure compliance with local laws and regulations, and we encourage you to ride responsibly and safely at all times.

Common E-bike Battery Problems and How to Fix Them

There’s nothing worse than having to spend hundreds or thousands on an eBike only to have problems with its battery. Don’t get me wrong; e-bike batteries are built to last. but they’re still prone to failure if they aren’t adequately taken care of during their lifetime.

What happens if your battery fails?

Well, in this article, I’ve covered some most common eBike battery problems and how to fix them. So, if you’d like to know more. keep scrolling!

Ebike Battery Problems

When it comes to eBike troubleshooting, there are a couple of things that might be causing your battery problems, including:

  • eBike battery pack swelling
  • eBike battery not charging
  • eBike battery not running for very long
  • eBike battery pack not holding a charge
  • eBike not turning on
  • eBike not speeding up

Don’t worry, though. I’ll walk you through each one here!

eBike Battery Pack Swelling

If your eBike battery pack is swelling up, well, you likely have a pretty serious problem with one. or more. of the lithium-ion cells.

Some electric bike models use flat pack cells. and these are known to swell if they suffer some damage. On the other hand, the 18650 lithium-ion cells are far more resistant to swelling and, in turn, more reliable.

If you notice that your eBike’s battery pack has a bulge in it, be sure you turn off the power and carefully remove the battery from your eBike. It’s a good idea to recycle the battery; most cities have a place where you can do this.

Now, some eBike battery packs are positioned inside the bike’s frame. That makes it somewhat harder to notice if you have a swollen battery pack.

The only way to check if the battery is swollen is to drop the lower plate and take out the battery pack. Note that you’ll have to disconnect some cables before you do this.

eBike Battery Not Charging

If your battery isn’t charging, start by checking the following:

  • Is the power turned on at the outlet?
  • Is the charger working and outputting over 36 Volts?
  • Is the battery hot?
  • Is the battery charger port full of dirt?
  • Has the battery been left discharged for several months?
  • Has the fuse blown in either the eBike battery pack or the charger?

eBike Battery Not Running For Very Long

Lithium-ion batteries generally have a life of 700 charge cycles. They usually tend to lose full charge capacity over this mark.

That is entirely normal. and will, unfortunately, only get worse as time goes on.

Still, if you’re charging your bike every few days, you should be able to get many years out of your electric bike before you begin to notice the capacity of your battery is starting to degrade.

If you notice your eBike battery isn’t running as long as it used to, check the following:

  • Is the battery pack being charged to 100%?
  • Do you have a dragging of a disc brake?
  • Is the terrain uphill?
  • Are you assisting your battery by peddling?
  • Are your eBike’s wheel bearings freely spinning?
  • Do you have a short circuit in the battery, wiring, or motor?
common, e-bike, battery, problems

Any of the scenarios mentioned above could lead to your battery discharging rather quickly.

eBike Battery Pack Not Holding A Charge

Lithium-ion batteries are good at holding a charge. However, like any other type of battery, they will slowly discharge over time.

If your eBike hasn’t been charged for a more extended period, it would be a good idea to give it a top-up. and see how it goes.

If you notice that you’re charging your battery, but it still discharges quickly without being used, you might have a short circuit somewhere or a faulty battery at your hands.

Here’s a quick test that can detect the problem:

Remove the battery pack from your eBike and charge it up on a bench. Once it’s fully charged, test the battery by leaving it off the bike.

If it holds a charge, the issue will be your electric bike. most likely a short circuit in the bike’s wiring or the motor. However, if it doesn’t hold the charge, your lithium-ion cell is faulty.

How Do I Know If My Bike’s Battery Is Charged?

Your battery charger will probably feature a LED light indicator that changes states depending on the bike’s battery level. It’ll go from red to green when the battery is fully charged in most cases.

However, in some chargers, the LED light will turn off completely when the battery is charged.

Either way, the point remains the same. you’ll have a way to track the progress while charging the battery.

Remember not to leave the battery pack on the charger longer than 24 hours, though.

Lithium-ion batteries don’t prefer being left on the charger. In the short term, this won’t hurt. but after a while, the battery’s capacity will go down.

You’ll also have an indicator of the battery’s current level on the battery pack itself or the speed controller. Some will use a 0-100% range, while others have a series of LED lights, depending on the model.

eBike Not Turning On

Let’s start with the obvious solution:

If your e-bike isn’t turning on, be sure to check if the main switch is in the “On” position.

Next, check the fuse for the battery pack. This fuse is usually located on the side and could blow up because of short circuits, vibrations, over-current, or old age.

If the fuse is in good condition and the battery pack is fully charged, check if the speed controller is in good condition, as well. The speed controller is the component that sends signals to turn on the battery pack.

These speed controllers could malfunction if damaged. either by dropping your bike or allowing water to get into them.

Hold the bike’s “On” button for about 10 seconds to force the speed controller to turn on. Some speed controllers are turned on by pressing the “M” button. Again, it depends on the e-bike model you have.

Be sure to check that your battery pack has at least two bars of power. An extremely low battery power level can lead to your electric bike not turning on, by the way.

Another thing to check here is that the electrical cables are correctly connected. Sometimes, the dirt roads can dislodge the cable connections; this is often the case with mountain electric bikes.

Water can find its way into these connections, too. Pull them apart and ensure the connection is tight.

eBike Not Speeding Up

There are numerous reasons why your electric bike isn’t speeding up.

often than not, the feedback magnets. positioned on the pedal crank or the rear wheel hub. for the proximity switch get dirty. Clean them with a rag, and you should be good to go.

This common eBike battery issue is often wrongly diagnosed.

Most quality electric bikes feature a switch on the back and front brakes to stop the drive motor. In some cases, these switches can get stuck. leading to their failure. Activate both brake levers a couple of times to try and free up the switch.

To check the limit switch, though, you might have to remove the whole rear or front brake lever. That’s another reason why you should avoid leaving your eBike out in the rain.

Also, while it might sound obvious, be sure to check if you’re in the proper mode. for example, pedal-assist, throttle-only, or pedal-only. I’ve sometimes found myself in the wrong mode, and I couldn’t figure out why my eBike isn’t speeding up.

There is typically a minimum speed that will activate the drive motor. That is just a safety feature. and it’s usually around 1.8 mph.

What Speed Are eBikes Limited To?

eBikes are limited to 25 km/h. or 15.5 mph. to conform to the majority of road rules around the globe. Once the motor reaches this speed limit, it will stop providing power further.

Of course, you can still pedal faster than 25 km/h, but you won’t get any assistance from the main motor.

Once the speed controller recognizes that you’re under 25 km/h, the battery management system will again supply power to the main motor. That is a standard component on most electric bikes. and, again, its role is to ensure that you conform to road rules.

Is 250Watts Enough For An eBike?

In most standard cases of use, 250W is more than enough power for you to ride your eBike on asphalt or dirt roads casually. A 250W drive motor is usually limited to 15 mph and can handle up to 240 pounds in rider weight.

If that doesn’t sound impressive, remember that you can always assist the main drive motor by pedaling.

You can always upgrade your bike with a Bafang conversion kit, though!


We can agree that e-bikes have come a long way since their first appearance. Granted, battery problems can occasionally happen, but most can be solved easily and quickly.

Hopefully, the tips I’ve outlined above will help you keep your eBike running fast. and for a long time. And remember:

The most significant danger to batteries of eBikes is excessive heat and low voltage. Make sure you keep your eBike battery topped up. and it will last for a very long time.

Electric Bike Batteries for Eunorau, X-Treme, Revi, Bakcou, Quietkat

We carry a wide range of electric bike batteries, mostly for the brands that we carry. These include ebike batteries for Eunorau, X-Treme, Revi, and many more. Here are the ebike batteries offered by the brands we carry. If you need help replacing an ebike battery, give us a call. To learn more about electric bike batteries, you can read our Ebike Battery FAQ blog post.

Eunorau 48V/12.5Ah | 48V/17.5Ah Seat Tube Silver Fish Battery for E-FAT-MN E-FAT-STEP Eunorau from 399 499

Eunorau 48V/14Ah 48V/17Ah Second Battery Options for FAT-HS | G20-Cargo | Max-Cargo | Defender-S | Specter-S | Specter-ST | META275 META275 Step Thru Eunorau from 469 569

Eunorau 48V/15Ah | 48V/17Ah Replace and Upgrade Battery for FAT-HS Defender-S Eunorau from 499 599

Eunorau 48V/16Ah | 48V/25Ah Reention Dorado ID-MAX Battery for Fat-HD, Fat-AWD UHVO (48V) Eunorau 1 review from 499 599

Ebike Styles

Really Good Ebikes

⚡30 N. Gould St., Sheridan WY 82801

⚡Our Mission: Provide the best online ebike shopping experience, and help people start their own ebike businesses

Overall rating:

By Richard Beech The Fiido L3 claims a 125 mile range that is quite frankly unbelievable. but we’ve tested it, and you really can go that far. Not only that, this electric bike is under £1,000. Let’s find out if it’s too good to be true (hint: it’s not).


Expert verdict

The Fiido L3 changed my commute for the better. With thicker tyres than some folding bikes (such as Brompton or MiRider) and with mudguards as standard, it’s a good all-weather bike.

Even in cold weather (which can negatively affect the performance of batteries), we managed to get a 90 mile range on a single charge from the Fiido L3 with an average weight male rider.

The fact that this range is coupled with a sub £1k price tag is astonishing. the Fiido L3 has to be one of the best value electric bikes for sale in the UK.

There are some things you don’t get at this price point. The wheels are 14-inch, which is quite small although the ride on this was pretty stable. Initial acceleration isn’t the best due to its cadence sensor. And it only has a single gear for manual cycling. But at this price, it’s a bargain.

The Fiido L3 In detail

Weight and folding

At 24kg including its big battery, it’s not the lightest or the heaviest folding bike out there. It does, however, have a really nice handle as part of the frame that makes it very simple to lift.

And it’s nicely compact. it takes up less room than most ebikes, in both folded and unfolded state.

Folding is fairly simple to do, and only takes a couple of seconds. There’s no latch to keep it folded, though, so you can’t wheel it easily. So like many more expensive models, this is a bike to fold for storage not for carrying on public transport.

Power and ride

My favourite thing about the compact Fiido L3 is the ride position. Its wide handlebars and adjustable front stem allow you to keep a straight back, whilst also maintaining good control of the bike, and keeping good peripheral visibility.

A balanced weight distribution and wide handlebars means the bike handles well, especially suited for the tight turns often required of city riding. Because the riding position offers such good visibility, I actually feel less vulnerable on the Fiido L3 than I do on a standard road bike.

And despite the low price point, there aren’t any comfort compromises. In fact, the opposite. The bike is very comfortable to ride thanks to its cushioned seat, which sits on a spring suspension. It’s not actually a saddle. it’s more like a bar stool. This brings an enormous amount of comfort for a bicycle.

Some foldable bikes with under 20-inch wheels can feel a little unstable, but I felt in good control of the L3. For its price point, I am bowled over by what Fiido have managed to achieve with this bike.

One drawback is that it’s single geared, so if you do want to cycle fast manually you have to pedal at a very fast rate.

Also it has a cadence sensor. This takes a short while to kick in when you set off so there’s a slight delay in terms of the assist when you turn the pedal. This is one of the ways Fiido has kept the price down. you don’t get the more responsive torque sensor that you find on pricier bikes. Once it’s kicked in, it does reach the top speed fairly quickly though.

Finally, the brakes are pretty sharp. Watch out as well. the front is controlled by the left handle and the back brakes by the right.

This is the opposite way round to standard UK bikes so we’d recommend you switch them round (which is a simple DIY job).


You can’t miss the monster 1000wh battery. so it’s a good feature that it is removable through a key ignition.

This means you can lock the bike up outdoors without fear of its most valuable component falling into the hands of would-be thieves.

The rear pannier rack has been a bit of a gamechanger too. The payload capacity on the Fiido L3 is 120kg, so I can chuck a heavy bag on the pannier rack and still have enough power to get around town without any hard pedaling.

Outside the UK, you can use a throttle on this bike. It has a really nice feature whereby if you hold it for more than a few seconds it will switch on cruise control automatically and you can let go.

Leave a Comment