Replacement Electric Bike Batteries Guide

Replacement Electric Bike Batteries Guide

How Fast Can Electric Bikes Go? Reading Replacement Electric Bike Batteries Guide 8 minutes Next How to maintain Your Electric Bike

A good e-bike battery can be cycled hundreds of times and generally has a life cycle of several years.

If your electric bike battery isn't giving you longer range, it means your battery needs to be replaced. But when you replace the battery you must ask yourself: how can I replace my e-bike battery?

Different Types of Electric Bike Lithium Batteries

The first thing to consider when replacing the battery for your e-bike is the type of battery. There are three main types of Lithium batteries on the market today: ternary lithium battery , lithium manganate battery , lithium iron phosphate battery.

The ternary lithium battery is a lithium secondary battery with three transition metal oxides of nickel, cobalt and manganese as the positive electrode material. It combines the good cycle performance of lithium cobaltate, the high specific capacity of lithium nickelate, and the high safety and low cost of lithium manganate. The theoretical life of a lithium battery is about 800 cycles, which is medium among commercially available rechargeable lithium batteries. The current use of esoulbike is ternary lithium battery.

Lithium manganate battery refers to a battery whose positive electrode uses lithium manganate material, with low cost, good safety and low temperature performance, common problems, battery bulging, flatulence, and the most serious is the outflow of electrolyte.

Lithium iron phosphate battery, high-efficiency output, good performance at high temperature. After 500 cycles, its discharge capacity is still greater than 95%; the cycle life of the battery pack should be 800 to 2000 times

You can consider what type of battery you choose according to your budget, needs and more.

Estimate how far you will be able to go on the battery you choose?

The main function of the battery of an electric bicycle is to provide the maximum riding range. Its capacity is in Amp-hours or Ah. Amp-hours corresponds to the measure of current the battery can deliver in one hour at a usable voltage or the measure of capacity your battery has. In short, the higher the amp-hour number, the farther you can drive.

It's worth noting that there's no standard way to accurately measure a battery's range. However, we've given you a way to estimate range, and you can extrapolate the approximate range of your battery from a formula.

All batteries have voltage and Amp-hour ratings, and multiplying the two will give you watt-hours. The watt-hour is an objective measure of the actual energy stored by the battery.

Volt x Amp-hours = Watt-hours

This mathematical equation can help you estimate the distance you have traveled on an e-bike, but to calculate the exact number of miles, divide the result from this formula by 12-14 watt-hours, and you can get an estimate miles. Because there are many external factors that can affect the driving distance of an electric bicycle battery, such as riding on many hills, heavy objects on the electric bicycle basket or into a headwind, etc., these will affect the cruising range of the battery. In addition to that, pedal assist settings, outdoor conditions for riding, the age of your battery, and the condition of the bike are all important factors in battery range, so we expect 12-14 watt-hours per mile. But keep in mind that this is only an estimate, and this number is subject to change as other factors change.


Watt Hours

Estimate Range

36V 17.5Ah

630 Watt Hours

45.0-52.5 miles

48V 14.0Ah

672 Watt Hours

48.0-56.0 miles

36V 24.5Ah

882 Watt Hours

63.0-73.5 miles

48V 17.5Ah

840 Watt Hours

60.0-70.0 miles

36V 17.5Ah

630 Watt Hours

45.0-52.5 miles

48V 14.0Ah

672 Watt Hours

48.0-56.0 miles

36V 25.0Ah

900 Watt Hours

64.3-75.0 miles

48V 20.0Ah

960 Watt Hours

68.6-80.0 miles


When you should change the battery of the e-bike?

The ebike Battery life depends on the type of battery. The battery should be replaced when your battery no longer provides more riding range. You can continue to use your e-bike after changing the battery, so when is the right time to change your e-bike battery?

If you're not sure if your e-bike battery needs to be replaced, the most straightforward way is to take it to the nearest repair shop and do some testing to see if your battery is working properly or needs to be replaced.

There are several signs that your battery is deteriorating, such as: slow charging, damaged battery, reduced mileage, etc. If your battery has one of these conditions, it means you need to replace your battery. Let's discuss these indicators one by one.

Lower Mileage

You need to know that the average battery life is 3-5 years, and this life will also change depending on how you maintain it, but no matter how well you maintain it, your e bike battery needs to be replaced after its service life is over. One of the great signs that the battery life is coming to an end is when the battery is fully charged, the driving range is significantly less than it was before. If this happens, it means you need to replace the battery.

Physical damage

During long-term riding, you may encounter various roads. The bumpy road will bring vibration to the e-bike. The large vibration may cause the battery to shift from its original position, which will shorten the cable or damage the battery case. In addition, it might cause terminals to get into contact with a conductive surface, which leads to overheating and maybe even fire. In the event of such physical damage, the battery should be replaced immediately.

Failed charge

Another sign that the battery needs to be replaced is a failed charge. Under normal circumstances, your battery is dead and only needs to be charged and can be used, but when your battery fails to charge, you need to replace it with a new one.


There are other situations that mean you need to replace the battery, such as your e-bike battery has swollen, in some cases the battery has become overheated, or the battery is giving off an unpleasant smell, etc. The battery needs to be replaced immediately.

Where Should I Go to Get a Replacement E-Bike Battery?

You can go back to the original retailer and buy it. If you own a complete bike, you should try to buy replacement batteries for your e-bike from the original retailer. Usually, you can buy batteries from your local dealer, or you can contact the e-bike company directly to purchase batteries. The same goes for e-bike kits, try to buy replacement batteries from the original retailer first.

If the original retailer is no longer in business or they cannot provide replacement batteries, then you can source batteries by looking for the original manufacturer.

If the original brand of battery is no longer available, you can look for a battery that is compatible with your e-bike, but be sure to consult a specialist store and choose a reputable company.

It is worth noting that replacement batteries that do not apply to the original manufacturer may void the warranty of your e-bikes or electric bicycle conversion kits. For specific operations, you need to consult the e-bike or kit company to understand their policy on using after-sales replacement batteries.

What Should I Do With My Old E-bike Battery?

When you've replaced your battery, you'll think about what should I do with my old battery. In order not to pollute the environment, it is worth thinking about how to deal with old batteries.

The ideal solution, if possible, is to take the old battery back to the dealer where you bought it, and the dealer will recycle it.

In the U.S., e-bike batteries are establishing their own recycling program. It was organized by People for Bikes and will be directly coordinated under the auspices of Call2Recycle. There will be a network of battery drop-off locations from the nation’s roughly 3,000 independent bike shops. Both manufacturers and retailers can register here.

The consortium brands are funding a battery recycling service, which will be offered to customers for free. Of course, consumers will still have to pay for battery replacements.

For now, there is already such a ready-made recycling network in continental Europe, and the UK is just starting to build one.

This e-bike battery replacement guide hopes to give you more information about the battery, however, this is just the tip of the iceberg, if you have more news, please leave a message and let us know!