54V ebike battery. About my electric bike

v 20AH 816 Watt hours Battery

This battery has a built in battery management system with the following features, over voltage protection, over current protection, overload protection, short circuit protection, temperature protection, battery balancing and power protection.


Please note: This 48v battery is fully charged at 54v

Key Features:

  • Suitable for 48v 1000w – 2000w Motor Kits.
  • Easy to Install.
  • Over 1000 Life Cycles.
  • Anti Theft Lock.
  • High voltage cut off: 54v.
  • Low voltage cut off: 40v.

Packaging includes:

  • 1 x Battery.
  • 1 x Charger 48v 2A (4A charger is also suitable).
  • 2 x Keys.
  • 1 x Mounting Bracket.

Important: We recommend that this battery is installed by a competent person to ensure your battery is fitted safely and correctly.

We offer 12 months warranty and we provide a full after sales service.


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Different types of chargers for electric bikes.

Chargers for electric bike batteries aren’t universal. You should always use one designed to suit your battery pack to maximise its life span and avoid fire hazards caused by overheating.

eBike batteries come in 12-volt increments, usually starting at 24v (for small bikes) moving up to 36v (for a standard bike) and then 48v-52v (high powered bikes).

The majority of eBikes fall between the 36v. 48v range.

Here is an example of pairing the right battery voltage with the right charger voltage:

  • A 36V bike should have a charger that goes up to 42V
  • A 48V bike should have a charger that goes up to 54V

When choosing a charger, check the charger connection point is compatible with your battery. Some chargers have a 1-pin or 3-pin connection, for example.

If you’re buying the charger online, you’ll also want to make sure it can be plugged into an Australian powerpoint.

Many eBikes are sold with a compatible charger but it is important to know how to make the right choice if replacing or buying a spare one.

How long does it take to charge an electric bike battery?

Fully charging a battery typically takes between 2.5. 6 hours, depending on the type of battery charger.

Here’s how to work out how long a charger will take to charge your bike battery:

Let’s say you have a 48-volt battery with 10 amp hours and a 2 amp charger.

Amp hour is the rating used to tell you how much amperage a battery can provide for exactly one hour.

ebike, battery, electric, bike

Divide the amp hours of the battery (10) by the amps of the charger (2) to get the number of hours it will take to charge. 5 hours, in this example.

10 amp hours / 2 amps = 5 hours

If you want to charge the battery faster, you’d need to use a charger with more amps.

For example, a 5 amp charger would get the job done in 2 hours (10 amp-hours / 5 amps = 2 hours) but a faster charge isn’t always a good thing. Charging at a slower rate is healthier for your pack.

Should you leave your bike battery on the charger?

We don’t recommend leaving your battery constantly connected to the charger while the charger is plugged into power.

Whether the battery is in use or not, it’s losing tiny amounts of voltage all the time. If you’re putting your battery on charge all night, every night it actually wears the battery out faster.

Plus, overcharging will cause the battery to heat up which can become a fire hazard.

Charging a battery to 90% rather than 100% each time you charge will help increase its overall lifespan. You’ll also boost battery longevity if you don’t top up the charge after every single ride.

That said, you want to avoid allowing the lithium battery to drain completely. put it on charge when it’s around 30%.

Even if you haven’t been using the bike, we suggest recharging your battery at least once a month.

Charge cycles

Most lithium-ion battery manufacturers give a warranty period for the battery. usually 500. 1,000 charge cycles.

A single charge cycle is counted as charging the battery from 0 to 100%.

Let’s say you use 25% of the batteries capacity, then recharge to 100%.

You need to repeat this 3 more times to be counted as a full charge cycle: 4 x 25 = 100.

As we mentioned earlier, it’s better to avoid draining the battery completely (0%) or charging it fully (100%) if you want to maximise battery life.

Some of the more sophisticated chargers available allow you to cap the charge maximum to 80%. 90% so there’s no chance of hitting 100%.

Or, you can set a timer for one to two hours to remind you to check the charge status.

If you’re planning to head out for an all-day ride and want a full battery, charge it to 100% as close to the ride as possible.

This reduces stress on the battery by not having it inactive at full capacity for an extended period.

If you’ve got any questions about the right battery for your electric bike, we’re here to help! Call 1300 936 399, email hello@crooze.com.au or reach us on

How to Charge an E-Bike Battery Without a Charger (7 Alternate Methods)

Now, let us jump into the ways to charge electric bike without charger in an emergency (when you don’t have a charger or your ebike battery charger not working) we are so curious about:

Method No. 1: You can charge with a car’s battery

All the e-bikes out there that you know, most of them use a 12 volts DC removable charger. The battery can be plugged into any receiver that is compatible with it.

If you have a car with a 12 volts DC outlet, you can set the battery of the bike in the car and then you can switch on the ignition and you are good to go.

Method No. 2: Charge using a solar panel

This is the best option I could ever think about.! Solar energy is so good and we all know about it pretty well. It is cheap and also very good for mother nature. It does not harm nature and fulfils our needs in the best ways possible.

You can connect the right panel to the inverter and you can connect it to the charger of your e-bike and your work is done. So if someone asks you Can I charge my eBike with a solar panel then say yes.

Method No. 3: By an alternative battery

If you have ever studied Current and Electricity in physics you must be knowing about the series and parallel ways of connecting the batteries which generate more current than usual.

With the help of these ways of connecting a battery, you may connect it and draw current from the batteries which will help you charge your bike without any problem.

But then again you have to make sure that the current coming out of the battery is compatible with the battery of your e-bike because then only it will be a smooth process. Otherwise, it may harm your e-bicycle battery.

Method No. 4: You can charge it by using your pedal

If your e-bike has the inbuilt feature of charging through the pedals your problem is solved. They use the pedalling technique. Not getting?

Wait let me explain. So, what happens is when you are riding the bicycle I mean your e-bike at that time the kinetic energy (the energy of motion) produced is lost through the heat in the brake pads and the resistance through the wind.

By the method of conservation of energy, some bikes make this thing possible and in a perfect way. They capture the energy and convert it into electrical energy and it charges the battery.

Method No. 5: Charge by a generator

This would have come into your mind even if I didn’t tell you. Yes, a generator. It is a very easy process and mostly when there is a short circuit we often use a generator to draw current so why not charge your e-bike with it?

It is a very easy process to follow to charge your e-bike with a generator. You have to connect the outlet to the battery of the bike. For deeper details, you can watch videos on how to do that because of course, you do not want to mess all these up.

Method No. 6: Charge with a portable charger (Jackery)

Can I charge my ebike battery with a portable charger? Yes, You can use a portable charger of course. With all the methods of technology present in front of our eyes, how can we not consider this? This one is always good when it comes to charging anything in case of travelling or emergencies.

The minimal current needed to charge up an electric bicycle is 15A (amperes) so make sure the charger fulfils the condition, if it does, what are you thinking about, go charge your e-bike easily.

Method No. 7: Charge from a charging station

Nowadays with the evolution of technologies and with the world growing so fast, most people have found out that there are e-bikes covering the markets. So, charging stations have also evolved to be there for our needs.

You can always opt for them if there are some near your locality or house. One thing to make sure of is that you must check if the charger is compatible with your battery or not. In India, You will find Yulu zones for charging Yulu Miracle (e-bikes).

Ebike Battery Charging Tips for a Long-Lasting and Healthy Battery

One of the key components of an eBike is the battery. If you want to keep it in good condition and shape. So, here are seven electric bike charging tips for long-lasting battery life:

Tip No. 1: Make sure to use the right charger

Very Important tip to take care of the eBike battery. Always charge the E-bicycle battery with the right type of charger otherwise it may damage the health of the battery.

Most e-bikes have lithium-ion batteries which generally lie between 36v to 48v or 2-7 amperes. And for such batteries has specific lithium-ion chargers which need 110v current.

So, always take advice from the brand customer support in case of any confusion otherwise your battery will go out of warranty.

Note: Most e-bicycle manufacturers provide a warranty (2-5 years) on eBike batteries so in case of any confusion read the instruction manual or contact them.

Tip No. 2: A clean, flat surface is ideal for charging an electric bike’s battery

It seems a very simple tip but I must tell you that it’s very important to keep your battery in a dry place (out of direct sunlight) and on a flat surface otherwise it may fall down and get damaged.

Tip No. 3: Make sure you fully charge the battery before you use it for the first time

Whenever you buy a brand-new Electric bicycle. It is always recommended by eBike brands to fully charge (around 12 hours) their new battery for the first time before heading towards the roads. Why?

Because the initial charge for long hours ensures the current flow through all the cells which is very important for good battery health.

Tip No. 4: Always check the battery level after every ride

You should charge your ebike regularly in order to maintain the health of the battery. Checking the battery level after a ride is as important as you check the battery level before a ride. Never let your battery level be less than 30%, Always remember this tip.

Tip No. 5: Don’t overcharge your e-bike’s battery

You know this quote: “Excess of anything is harmful”. So keeping this point in mind we would suggest you never overcharge your eBike battery if you want to use it for a long time. Overcharging the battery increases the temperature to an extreme level which may cause the battery cells.

So, set a reminder in your phone whenever you plug a charger into a battery for charging so that you don’t forget to disconnect them. In that way, your battery will not be overcharged.

Tip No. 6: Take the Battery out of the Bike to Charge It Every Few Months

Generally, eBike batteries are taken out of the bike for charging But there are some e-bikes which let you charge the battery without taking it out of the bike. It is still recommended that you remove the battery from the bike regularly to recharge it so that all connections can be checked.

Tip No. 7: Make sure the bike’s battery is not empty before storing it away

Last but not least, If you plan to store (2 to 6 months) your eBike because of any reason, check the battery level first. If the battery is low, don’t store it before charging it to full or at least 50% (if running out of time). Because batteries are drained (self discharged) if they are kept idle.

When you follow the above-mentioned eBike battery charging tips, your battery will be in good condition and have a long-lasting life. If you have any questions to ask regarding this, feel free to ask in the comment section below.

Frequently Asked Questions (FAQs): Charge an E-Bike Battery Without a Charger

Q1. How can I charge my electric bike battery at home?

It is very simple to charge an electric bike battery with the original charger. But the main question is how to charge e-bike batteries without a charger, then you can charge them by replacing a car’s battery, with a generator current, inverter (high-powered), and solar panel. Read above to know more.

Q2. Can you charge an ebike battery with a car charger?

Yes, you can charge an ebike battery with a car charger when you don’t have the original charger. But make sure to check the car’s battery power and current flow otherwise your ebike battery may get damaged.

Q3. Can you use any charger for the ebike?

Generally, A majority of electric bikes operate between 36v to 48 volts. But you need to pair the right battery voltage with the right charger voltage. For eg., A 36v eBike battery should be charged with a charger that goes up to 42v and similarly, a 48v battery with a 54v charger. Learn more.

Q4. How long does an eBike battery last?

Nowadays, lithium batteries are the most common type of battery used in electric bikes. Generally, high-quality lithium-ion batteries last somewhere around 2 to 5 years. And it depends upon many factors such as brand, how you take care of them and usage.

Q5. How long does an ebike battery charge last?

Well, It depends upon the load you give to the battery, the more load you give the lower will be the duration and vice-versa. As we know the battery is the lifeblood of an eBike.

A 500wh eBike battery typically lasts for 2 hours when there is a load of 250w. When it comes to distance, it can be somewhere around 40km to 112km on a single charge (depending on load).

Q6. How do you charge an e-bike when camping?

There are various methods to charge eBike batteries when camping such as using a power bank, car battery inverter, at charging stations, using a generator, solar panel (energy) and a high-powered inverter.

Q7. Can we take insurance for eBike Battery?

Yes, you can take an insurance policy for an electric bicycle which also covers your eBike battery because the battery is part of eBike. As a result, if your bike met with an accident or has been stolen, you will be compensated for your loss.

  • https://batteryuniversity.com/article/bu-409-charging-lithium-ion
  • https://www.ebikekit.com/blogs/news/electric-bike-batteries-explained
  • https://batteryuniversity.com/article/bu-802b-what-does-elevated-self-discharge-do
  • https://batteryuniversity.com/article/bu-410-charging-at-high-and-low-temperatures
  • https://batteryuniversity.com/article/bu-702-how-to-store-batteries
  • https://thebikefetcher.com/ebike-battery-charger-problems/

Bittu Gupta

I am the founder and editor of Cycling Guru India, a fitness freak and passionate cycling enthusiast from India. My passion for cycling led me to build the Cycling Guru blog site where I share my cycling experience, cycling tips guides, and help people to get the best bicycle. Feel free to contact me on my social accounts or through the contact form. You can also follow me on Strava.

Keep It Cool

Batteries hate being at extreme temperatures. Especially warmth!

A fully charged battery, kept at a high temperature can dramatically decrease the life of the battery.

If you’re following step one above, you already know not to fully charge all the time. Sweet!

Now you just need to find a cool spot to leave your battery when you are finished charging!

Certainly don’t leave it in direct sunlight, eek!

But at the same time, try not to leave it in a warm area of your house like a conservatory, sunroom, hot water closet.

Closed, small spaces aren’t usually good either.

Somewhere ventilated, cool and not humid is best.

If the area you live in is always like this – just try your best!

Riding outside in very cold, or very warm temperatures will also affect the performance of your battery.

You may not be able to avoid it. But keep it in mind also!

Don’t Push Too Hard

If you’re really keen on keeping your battery in tip top shape, don’t push your bike too hard.

An ebike motor that’s working hard demands lots of juice!

Your battery will be sucked dry in no time if you’re always pumping it at full speed!

Discharging your battery more often leads to charging it more often!

ebike, battery, electric, bike

But this also means you’re stressing out the battery more often with constant discharges and recharges.

(If you’re charging fully and discharging fully, you’re in for a bad battery life!)

So over time you’re using up more of the battery’s finite life span.

Compared to someone who uses their ebike at a more leisurely pace, they’ll be charging less.

Which means over the same period of time, your battery will hold less of a charge than theirs does.

So keep that in the back of your mind when you’re screaming down the street at 30mph!

(Although I can’t pretend to be an angel here. I love screaming down the street at 30mph!)

Keep your pedal assist (or throttle!) use at the lowest you can comfortably use.

Sometimes it’s nice to slow down and smell the roses.

Storing Your Battery

You might be wondering if it is okay to store your battery for long periods of time.

The answer is yes! With a few things to think about logistically.

Firstly, you should try to keep your battery charged around 60% when storing for a long period of time.

Long period of time being more than a couple of weeks.

This is the ideal charge to prolong the life of the battery.

Being charged more or less can stress the cells and make them age quicker!

You’ll also want to keep the battery away from anywhere that will keep it too cold, or too warm.

That means you should stay away from a cold basement, or hot water closet. It should be stored around 59F – 68F (15C – 20C).

Make sure the area is not damp, nor should any moisture get in.

So don’t place your battery above the kettle where steam can easily seep into the case.

That’s a fire waiting to happen!

A cupboard in your house should be a fine place to store it for an extended period of time!

A Few Bonus Tips

Bonus #1

Riding your bike flat generally won’t damage it. Woohoo!

This doesn’t mean you should run it flat all the time (see point #1!).

Most reputable batteries will have a Battery Management System (BMS) which actually prevents the cells dropping dangerously low.

So you won’t be killing the battery by running it “flat”. Flat being where the BMS cuts off the battery.

If you have lights on your bike, you should still be able to use your “flat” battery.

This is because the lights draw very little electricity, so should not cause much voltage sag.

Bonus #2

You should also clean your battery (and ebike in general!) after getting it dirty, or wet.

Most decent batteries will be waterproof to some degree, so that they won’t die during a quick downpour.

However, they are still best kept when they’re dry and all clean.

So clean up your ride to have a good time!

How to test an electric bike’s BMS/charging system

When the charging system of an electric bike fails, it means one of a few things:

  • Supply failure: The charger might be broken (not delivering voltage or current necessary to charge)
  • Mechanical failure: A connector wiring inside the battery might be broken,
  • Cell failure: Some of the cells inside the battery may have failed, or
  • BMS failure: The battery management system may not be operating

To get to the core of the problem, you have to test everything one by one.

The first (and easiest) thing to test is the charger. You measure the output voltage. For a 52V battery like mine, it should be supplying about 58V. For a 48V battery it should supply around 54V.

After you measure the output voltage, you do what’s called the light bulb test — where you use an incandescent bulb hooked up to the outlet. This is easier in America (or Japan I guess) where the voltage supply is 110V, but it still works with 220V bulbs.

You could also test it with an automotive bulb if you have one. But it might blow!

Second, test for mechanical failures. Probe around with a multimeter and make sure you read operating voltage in the places where you should.

Also, open up your e-bike battery and check all the wires are intact, and that none of the solder joints have broken. Bikes get beaten up and it’s possible — likely — that a joint will fail at some point, especially if your battery has gone flying across the road because you forget to lock it (guilty! Actually I lost the key for a while. )

Finally, you have to test the internals of the battery.

I did a suite of tests that Luna Cycle said I should do

  • Opened it up and tested all the wires and connections
  • Did a BMS battery reset
  • Tested voltages across the pins — making sure every individual cell was operating correctly

One trick for testing voltage across the pins of the BMS is that they’re often coated with silicon. You should scrape it away gently before checking the voltage.

How does the BMS of an e-Bike battery fail?

A BMS is a delicate issue. There are actually people who believe in charging batteries without a BMS, like this guy on YouTube:

If jumping your BMS is unsucessful, you can do more extensive testing on your battery pack and on your BMS.

Watch the video below. The core of it is to check individual cell voltage (confirming they’re in the 3.6-3.8V range), making sure no cell is dead. If it’s dead, you can replace it, probably for about 15-20 of parts (and. a spot welder and some nickel strips).

Look at the number of pins and the style of connector at the top of the BMS.

It seems a lot of BMS manufacturers have an informal agreement as to what the connector should look like. This is good news!

The second rating to look for is the current rating. My bike is rated for 50A peak, so I found a controller that promised to get to that spec.

I would treat current ratings on eBay with a grain of salt. It’s possible they might be truthful, but it’s possible they’re wildly exaggerating. Given they’re so cheap, get the biggest spec one you can reasonably afford, assuming it’ll be a weak point.

Installing the new BMS

There are three steps to installing the new BMS.

ebike, battery, electric, bike

Firstly, remove the connector at the top. Mine is a 14-pin connector; you might have 10 or 12 pins or some other number. This should be a plug-and-play replacement for your current BMS.

Secondly, use a low-power soldering iron to de-solder the three connectors at the bottom.

Finally, use the soldering iron to connect the wires to your new BMS.

You should now be ready to power up and give your repaired battery a go. If you’re lucky, like I was, then your charger will whirr to life and your battery will take a full charge.

Optional — I realised, as I was writing this, that there was a chance I could have destroyed the BMS again! The battery was discharged, and a surge might have fried it.

ebike, battery, electric, bike

Luckily, this didn’t happen. But you should consider perhaps directly recharging each cell of the battery pack if you have a 3.6V battery charger available.

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