Which battery should I choose for my e-bike – 7Ah or 10Ah? Select the battery that best suits your needs.
When choosing your BZEN e-bike, you can configure its features, such as the model, the colour or the capacity of the bike battery. The latter is an important aspect of the bike, as the capacity of the bike battery significantly determines the everyday comfort and range of the e-bike. What factors should be taken into account when choosing a battery so that your new bike meets your expectations 100%?
Why did we choose a battery that is built into the frame?
As you can see or rather not see at first glance is the battery. This is because in our e-bikes it is installed inside the frame – in contrast to the popular e-bikes where it is usually placed outside the frame. This solution offers many advantages: The bike looks much nicer and the battery is protected from theft or damage. Furthermore an electric bike with a centrally mounted battery is well balanced – which makes it easier for you to keep your balance (the centre of gravity is in the lower, central part). These are the advantages of electric bike with a built-in battery. This also means that you won’t lose or forget it anywhere. It is stably and securely mounted in a frame with an easily accessible charging port.
What do the symbols Ah, V and Wh stand for? Specification for lithium-ion battery in e-bikes.
When you read about the batteries in electric bicycles, you always see the units mentioned in the headline. What do they actually mean?
Ah – is the number of Ampere-hours; 1 Ah is the current of 1 Ampere that flows for 1 hour. To put it even more simple: it is the capacity of the battery. The more Ampere-hours, the longer the battery will last.
V – is the voltage, expressed in volts; it is the same for all our batteries and is 36 V.
Wh – the Watt-hour or capacity of the battery. This is a similar unit to Ah, but gives more information – it is the number of Amp-hours × the voltage of 36 V, as you can easily see from the capacities of our batteries: 7Ah/252Wh (so 7 × 36 = 252) and 10Ah/360Wh (10 × 36 = 360). So you can also say of the Watt-hours: the more of them, the longer you ride.
When referring to battery types, we indicate their capacity in Ampere-hours and Watt-hours. Knowing what these units mean will definitely help you choose the right battery for you. However, if physics has never been your passion or you just don’t want to deal with the technical details, you can simply assume that more Ah = more battery capacity = longer riding time.
Ah or 10Ah – which battery is best?
With this knowledge, it will be much easier for you to choose a bike and battery that suits your needs. As in BZEN bikes there are two battery types to choose from, it is better to think about this choice because a larger battery is not necessarily better for you – for example, because it is slightly heavier and takes a bit longer to charge.
The choice of battery is determined by several factors:
- How often do you cycle?
- How long does usually your ride take?
- What distances do you ride (short or long)?
- What type of terrain (e.g. flat or hilly)?
- Do you often carry heavy luggage (e.g. large shopping or a child in a baby seat)?
- Do you always have the possibility to charge your battery?
You should assume that the higher your demands on the battery and the bike – i.e. the more often and longer you ride in difficult terrain or with a child seat or shopping – the better a battery with a larger capacity will be. And if you often ride your e-bike outside the city, a larger battery is especially recommended.
Our experience shows that for a typical daily ride in the city (to and from work, 1 to 2 times a week to go shopping or to take the child to kindergarten, trips to friends) a BZEN battery with 7Ah/252Wh is sufficient. You can go 35-75 kilometres on a single charge, depending on the factors mentioned above. It is important to note that our battery is equipped with a BMS (battery management system) that allows the energy of the battery to be used more efficiently.
The 10Ah/360Wh battery has twice the capacity and allows you to ride up to 110 kilometres on a single charge. It is suitable for longer rides outside the city or for very intensive use of the bike (e.g. 20-30 km per day).
If you are not sure which battery is better for you, you can test the bike for 30 days – if you find that the chosen battery has too little or too much capacity, you can also exchange it for another one.
Charging the battery in the BZEN e-bike
It is important to know that the comfort of using your e-bike also depends on the charging time of the battery: a smaller battery takes about 3 hours to charge, a large battery 4.5 hours. So you can easily leave the bike to charge while you go to work or shopping – as soon as the battery is full, the charger switches off to avoid using more energy, so there is no risk of overcharging. All you need to charge is a standard 220/230 volt socket (available throughout the European Union) and the charger supplied with the bike.
If you forget to recharge, you can also easily ride your BZEN e-bike with a fully discharged battery thanks to ist light weight (approx. 16kg) – but it only takes 1.5 hours to recharge the battery to 50 % capacity and have much more fun.
The only situation in which you should avoid charging the battery is when the temperature is below 0°C.
E-bikes battery vs. weather – why you should choose an e-bike with integrated battery?
Weather conditions are a very important factor to consider when using an e-bike.
Even though our batteries are made from the most technologically advanced components, they are still electronic devices that – like laptops, cars or smartphones – can function less efficiently in very cold or very hot temperatures. However, in case of BZEN bikes, we have integrated the battery into the frame so that the weather and temperature don’t affect it as much as they do in bikes that don’t have a built-in battery. You can ride it safely in both winter and summer, but remember to take care of the battery and not leave the bike outside in extreme heat or cold. In fact, there’s nothing new about leaving your bike out in the rain, in the blazing sun or in the snow – the same goes for e-bikes. Take minimal care of your BZEN bike and it will serve you effectively for a long time.
E-Bike and E-Scooter Battery Fires Are on the Rise in NYC!
E-bike and e-scooter battery fires are becoming a significant safety concern in New York City. Gothamist reported in March that e-bike fires were on track to double in 2022, and their predictions were not wrong.
The FDNY has reported more than 130 e-bike and e-scooter fires in NYC so far this year, estimating the number will surpass 160 fires by the end of 2022. The current rate of fires highlights an approximate 50% increase in similar instances from 2021, totaling 104 e-bike and e-scooter fires for the year.
In response to the uptick in e-bike and e-scooter fires, the National Fire Protection Association (NFPA) announced a new micro mobility device safety webpage to respond to first responder and public concerns. The webpage provides educational resources about e-bike and e-scooter fires and how to regulate the risk to our community. Let’s take a look.
Why are E-Bike E-Scooter Batteries Dangerous?
Lithium-ion batteries are the source of power for most e-bikes and e-scooters. Science Direct states these batteries are one of the most popular forms of energy storage worldwide, used in nearly 86% of deployed energy systems. Unfortunately, their popularity doesn’t make them safe.
When lithium-ion batteries become damaged or are used incorrectly, they can overheat, catch fire, or even explode. NFPA reports these fires are unlike typical structure or vehicle fires, as they emit toxic gasses and burn extremely hot, putting anyone nearby at risk of thermal and alkali burns.
What Causes E-Bike E-Scooter Battery Fires?
Most lithium-ion battery fires occur from damage to the e-bike or e-scooter, but there are several other causes that riders need to be aware of to prevent tragedy.
The NFPA provides the following safety tips to reduce your chances of a battery fire:
- Purchase vehicles, batteries, and chargers that are nationally recognized to avoid defective and dangerous knockoffs.
- Only use battery chargers specifically designed for your vehicle.
- Follow all instructions for use, charging, and storage to avoid overheating.
- Only charge your e-bike or e-scooter until fully charged; do not leave it plugged otherwise.
- Charge one vehicle at a time.
- Perform regular maintenance on your vehicle by a qualified professional.
- Never throw lithium batteries in the trash.
- Keep lithium-ion batteries at room temperature when possible. Temperature below 32 degrees or above 105 degrees can be dangerous.
- Never store batteries in direct sun, in a car, or in proximity to children, liquids, or flammable materials.
How to Know if Your Vehicle is a Fire Risk
While there have been instances of e-bikes and e-scooters sporadically bursting into flames, a few signs indicate your vehicle may be a fire risk before a fire starts. Here are a few listed by the NFPA:
- There is a change in battery color.
- The battery emits an unusual odor.
- The battery is leaking.
- You see smoke coming off the vehicle.
- The battery consistently is not being charged.
Pazer, Epstein, Jaffe Fein NYC Motor Vehicle Accident Attorneys
At the law firm of Pazer, Epstein, Jaffe Fein, we have been fighting for the rights of New York City accident victims for over 60 years. If you or a loved one has sustained a serious injury at the hands of a negligent driver, our experienced trial attorneys are here to help.
To speak to one of our attorneys for a free case evaluation, please fill out our online form or call 212-227-1212.
Everything you need to know about e-bike batteries [from a battery engineer]
Would you be the person taking the stairs or the escalator?
I’ll be honest. barring the one-off day that I’m feeling particularly sprightly, I would just hop on the escalator with those 30 people on the right. And I’m willing to guess that most of you would too.
What we can gauge from this picture is that most people would rather do as little work as possible to get from point A to point B. This is especially true when it comes to commuting on a bike. The picture above is analogous to the difference between a regular bike and an e-bike.
Even if we address all the concerns when it comes to biking in a city (like safe biking infrastructure), we can’t expect to change fundamental human behavior. when given the option between less work or more work to achieve the same outcome, people will more likely choose to do less work.
Since getting my e-bike, I can comfortably bike from my home in Somerville to the Seaport district in Boston. a roughly 5-mile trip. in just about 20-minutes. All of a sudden, biking 5-miles is a piece of cake. I also don’t have to spend time sitting in traffic, waiting for public transit, or worry about showing up to a meeting looking like I swam across the Charles river to get there.
The beauty of an e-bike is that it makes cycling an inclusive mode of transportation because it doesn’t discriminate by age or physical ability.
When it comes to purchasing an e-bike though, there are a plethora of options for both the bike and battery. So how do you decide which one is best for your needs? As a battery engineer who has built hundreds of batteries and logged way too many hours soldering battery packs, here are my thoughts on the most commonly asked questions when it comes to e-bike batteries.
If you’re new to battery terminology, you might want to start here: Battery terms that every e-bike owner should know.
In this post, we’ll cover the following questions:
What is the best e-bike battery?
This is one of the hardest questions to answer. There are so many variables that go into what makes a good battery and what’s best for you, may not be the best for me. Even then, a good battery can perform poorly if it’s not cared for properly.
Battery packs are made up of individual battery “cells”. Cells are classified into cylindrical cells (like your AA and AAA) and prismatic cells (like the one in your phone). Each class of battery is manufactured in a variety of form-factors (in the battery world we use this term to mean size). The most commonly used form-factor of cells in an e-bike battery pack is the 18650.
A battery pack is only as good as it’s weakest cell.
When it comes to batteries, in my experience, there is a strong correlation between price and quality. I don’t follow this rule when it comes to most things like for example, box wine (I’m just saying, there are plenty of really good box wine options these days!). When it comes to batteries though, you really don’t want to be compromising on quality because you’ll eventually end up having to pay the price.
Here are some things to keep in mind when purchasing an e-bike:
Cell Manufacturers: Panasonic, LG, and Samsung have a good reputation in the battery industry for their high quality cells, so paying a premium for these cells is certainly worth it. If the e-bike you’re trying to buy doesn’t have or provide cell manufacturer information, they’re likely not going to be a reliable source anyway.
Cell Chemistry: Lithium-ion (li-ion) batteries are the best option for e-bikes. Although lead-acid batteries are significantly cheaper, they’re three times as heavy as their li-ion equivalents.
Li-ion has several variants of cell chemistry. The most popular ones for e-bikes are Nickel Manganese Cobalt (NMC), Lithium Cobalt Oxide (LCO), and Lithium Iron Phosphate (LFP). The metrics to look for when selecting a cell chemistry are:
- Specific Energy: has an impact on the range of your battery.
- Specific Power: how the battery handles high load scenarios like going up
- a hill.
- Safety: does the chemistry have a history of high in-field failures.
There are trade-offs when choosing one chemistry over another, but as we’ve shown in the image below, NMC and LFP are both great options that both offer the best value in terms of performance, price, and safety.
Picking the right battery chemistry has to do with figuring out what matters most to you. Do you want a battery that has a longer range (higher specific energy) but doesn’t have as much power? Or do you want a battery that has a more power (higher specific power) but may not last as long?
In my opinion, the best e-bike batteries are likely going to be made from cells manufactured by Panasonic, LG, or Samsung with either LFP or NMC cell chemistry.
What is the range of an e-bike battery?
The range of a battery pack depends on the amount of energy packed inside of it and is measured in Watt-Hours (Wh). Watt?
Watt-hours are calculated by multiplying the battery capacity, in Amp-hours, by the battery Voltage, in Volts.
Let’s assume that, on average, 1-mile requires about 25Wh of energy. So a 14Ah, 36V battery should get you about 25-miles per charge.
Keep in mind that the weight of the rider, outside temperature conditions, and the amount of pedaling will make a significant difference in range.
A word of caution: the range that e-bike manufacturers provide should be taken with a grain of salt. That number is generated from tests that are run in perfectly tailored lab conditions. Do you charge any of your electronics in an incubation chamber set at 28° C with a lab-grade charger that applies the perfect current while charging? Yeah, I don’t either. And so, We should assume that the manufacture-specified range is delivered only if the battery is charged and discharged under ideal conditions i.e. not real world conditions.
For a more realistic estimate, shave off 15% of the manufacturer specified range and assume this padded number to be your real range.
If you’re looking for a longer range, choose a battery that has higher capacity (Ah). If you’re looking for more power, choose a battery that has higher voltage (V). Learn more why voltage and capacity matter.
What is the lifespan of an e-bike battery?
There are several factors that affect the lifetime of a battery such as:
- environmental conditions: temperature during charging discharging
- charging rate: how fast or slow your battery is charged
- charging voltage: what voltage the battery is charged to
- depth of discharge (DoD): what voltage the battery is discharged to
The list above isn’t exhaustive but, in general, batteries decay as a function of time in the charged state. Period.
Day 1: You get your new e-bike and charge it up to 100% and go on a bike ride. When you come home, you charge the bike back up to 100% and you’re excited to ride it again soon.
Day 2. 364: Life get’s in the way and you still haven’t been out on your bike since that first ride.
Day 365: One year later, it’s the perfect day for a bike ride and you finally have some time on your hands. You head to your basement, unlock your bike, and excitedly turn it on. 80% charge. What? You clearly remember charging your bike to 100% last year before moving it to the basement!
The truth is, we can’t beat thermodynamics. I’ll say it again: batteries decay as a function of time in the charged state.
Now, because you left your battery at 100% for a whole year in a basement with no temperature control, you inadvertently caused your battery to lose a certain amount of irreversible capacity. Your range will be ~20% lower and you’ll likely have to replace your battery sooner than you expected. The table below shows you how much recoverable capacity exists in a battery after storing it at different temperatures and different charge states for 1-year.
This is why a lot of electronics come with batteries that are only partially charged. to help slow down this decay. That being said, it’s hard to track how long e-bikes and their batteries have been sitting in warehouses before being delivered to your door so you could get a battery that has been decaying for a year or two.
Manufacturers also tend to overrate their batteries and will make claims about certain batteries having a lifetime of at least 1,000 cycles. Show.me.the.data.
The lifetime of a lithium-ion battery is described as the number of cycles until the capacity (Ah) drops below 80% of it’s initial capacity. In general, this is roughly 250-400 cycles (depending on battery chemistry and other factors) which amounts to roughly 1.5 to 2 years if you charge discharge daily and care for your battery properly.
How to charge your e-bike battery to make it last longer
- The thing that will kill your battery faster than anything else is leaving it charged at elevated temperatures. If it’s 80 degrees outside and you have your e-bike fully charged, move it indoors where it’s cooler and try to drain the battery as soon as possible.
- Charge your battery at room temperature as often as possible.
- When sourcing an e-bike battery charger, the slower the charge rate the better. For example, if you have a 2-Amp charger, and your battery is a 14 Ah battery pack, you are charging at 14 Ah / 2-Amps = 7-hours. This is a nice, slow charge which will certainly improve the longevity of your battery pack. Avoid charging at rates that are faster than 2-hours for a full charge.
There’s a lot that goes into choosing the best battery for you e-bike, and there certainly isn’t a one-size-fits-all approach. But if I were buying an e-bike battery today, here’s what I’d do: LFP or NMC, slow charge, avoid storing or charging in hotter temperatures, and leave the battery at around 30% charge if you don’t plan on using it for a while.
Have questions? We’d love to help. You can get in touch using the contact form or find us on @somerville_ev
Also, subscribe below for alerts on our next post to learn more about batteries!
HAOQI Cheetah Full Suspension Electric Bike. Dual Battery Version Available
Cheetah is our Flagship ebike that guarantees the ultimate riding experience with its Dual Full Suspension System. Boasting a powerful 48V 25Ah battery, you can effortlessly conquer up to 85 miles on a single charge. Its ergonomically designed frame and fat tires provide unparalleled comfort on rough terrains such as snow, beaches, rugged mountain roads, and hills. The hydraulic brake system ensures maximum safety, making the Cheetah the perfect ride for adventure seekers.
Discover unbeatable power and performance with our ebike’s raw reduction gear, providing up to 90NM of torque without deformation. The advanced chip ensures quick and stable signal processing that’s highly durable.
Discover unbeatable power and performance with our ebike’s raw reduction gear, providing up to 90NM of torque without deformation. The advanced chip ensures quick and stable signal processing that’s highly durable.
Ride with confidence on our ebikes, powered by high-quality Haoqi 48V 25Ah batteries that ensure long-lasting performance and efficiency. Enjoy 3 Years of Free Battery Replacement for this battery, ensuring your peace of mind and worry-free riding!
Ride with confidence on our ebikes, powered by high-quality Haoqi 48V 25Ah batteries that ensure long-lasting performance and efficiency. Enjoy 3 Years of Free Battery Replacement for this battery, ensuring your peace of mind and worry-free riding!
Rear Suspension
Engineered by FASTACE with a dual suspension system on bothfront and rear, it ensures effortless maneuvering on rugged terrain and seamless travel over bumps.
Front Suspension
Experience unbeatable comfort and performance with the front suspension fork, crafted from premium alloy material and featuring coil suspension, hydraulic lockout, and adjustable preload settings. With 80mm of travel, it guarantees a smooth and comfortable ride.
Aluminum Crankset
Experience unrivaled durability and protection with our ebike’s crankset, expertly crafted from premium aluminum and equipped with robust guards to safeguard the chainring and chainstay from damage. Enjoy effortless navigation on rough terrain.
Top Quality
Conquer any terrain effortlessly with our Haoqi motor, designed to power you up hills with ease. Experience unrivaled handling and a smooth, whisper-quiet ride.
Shimano Gear Shift
Revolutionize your cycling experience with our premium ebike’s Shimano 7-speed gear shift system and pedal-assist technology. Enjoy an effortless, efficient, and personalized ride like never before.
Hydraulic Brake
Maximize your safety control with premium hydraulic brake system. Enjoy efficient speed control and smooth, swift stops with a gentle pull of the brake lever.
- Battery 48V 16Ah / 25Ah High-tech Lithium Battery
- Motor 750W High Speed Brushless Geared Motor
- Bike Frame 26” 18” AL6061 M Mode
- Display KT-LCD10H E-bike Display USB
- Charger US Standard 3.0A Smart Charger
- Rear Cassette Shimano 7 Gears
- Pedal Assist Intelligent 5 Level Pedal Assist
- Tires 26” x 4”
- Charging Time 6~9 Hours
- Product Weight 73 Ibs
- Recommended Rider Heights 5.5” ~ 6.8”
- Total Payload Capacity 400 lbs
- Brake lever Alu alloy comfort grip levers with motor cutoff switch
- Chain KMC chain
- Freewheel Shimano 7 speed gear shift system
- Brake Hydraulic Disc Brake
- Stem Promax MA-400 SSABK
- Crank 170mm Forged Alloy
- Gearing Shimano- 14-28T BROWN/BK
- Front Fork RST Alloy front suspension fork with lockout and adjustment
- Rear Suspension FASTACE A8 / 850Bls / 185mm Length. Travel 50mm
- Throttle Half twist throttle
- Pedal Alloy pedal with reflectors
- Bike Frame 6061 Aluminum frame
- Headlight 48V LED light
- Handlebars Premium ergonomic
- Saddle Soft saddle
- Kickstand Heavy duty aluminum
- Seat post Diameter 30.4mm length 300mm
- Spokes Steel ED
- A.- Total Length 73.6″
- B.- Wheelbase 52″
- C.- Wheel Diameter 28″
- D.- Chain Stay Length 21″
- E.- Top Tube Length 24.6″
- F.- Handlebar Height 43″
- G.- Standover Height 31″
- H.- Handlebar Length 28″
- I.- Standover Height 29″
- J.- Maximum Seat Height 41″
- K.- Minimum Seat Height 34″
- A.- Total Length 73.6″
- B.- Wheelbase 52″
- C.- Wheel Diameter 28″
- D.- Chain Stay Length 21″
- E.- Top Tube Length 24.6″
- F.- Handlebar Height 43″
- G.- Standover Height 31″
- H.- Handlebar Length 28″
- I.- Standover Height 29″
- J.- Maximum Seat Height 41″
- K.- Minimum Seat Height 34″
Does the bike come mostly assembled? I’m a novice and is it easy to assemble?
Your bike will arrive mostly assembled. We will provide the tools and a comprehensive assembly video so you can assemble your Haoqi Bike bike within 20mins even if you are a novice.
Is the Bike with Fenders?
Yes, the bike with two fenders, it has to install yourself after receiving the package. E-bike full fenders2, multi-function repair tool1, Rear rack1, Charge1, Headlight and TaillightsHAOQI Unboxing Assembly Instructionshttps://www.YouTube.com/watch?v=QrmzxlZy_74
Do I need a license and Insurance to ride ebike on the road? No. The e-bike from Haoqi is completely under U.S regulations and laws which allow you to ride it without specific license and insurance.
Where can I ride an electric bike?
An electric bike is legally treated the same as a normal bike. You can ride an electric assisted bike anywhere you can ride your regular bike.
Which class does the Haoqi Leopard belong to?
Class 1 has a top speed of 20 mph without pedaling.Class 2 has a top speed of 20 mph without pedaling and has a throttle. Class 3 has a top speed of 28 mph without pedaling.Haoqi Leopard belongs to the class 2.
Can the speed limit be cancelled?
We do not recommend lifting the speed limit, if it is lifted, it will definitely affect the mileage. After the speed is released, it can rise to class3 level.
7.Is the battery of my Haoqi bike removable？
The battery can be removed and recharged.
8.Can I ride into the rain? What is the waterproof rating?
Haoqi electric Bike battery is sealed well enough for the bikes to be safely ridden in light rain. IP 50. However, it is not recommended to ride them through very heavy downpours, or through flooded streets when the crank and/or the motor can get splashed or even covered with water. It is best to take shelter until the rain eases and the roads are no longer covered with water.
Sales service
Email: vip@haoqiebike.com Phone: (501) 777-5124 Warehouse address : 4250 Shirley Ave. El Monte CA 91731
Notice: For more shipping information, send an email to vip@haoqiebike.com. We will get back to you in 24 hours.