Electric Bike Batteries Explained

What You Need To Know About Electric Bike Battery


Noel Joseph
August 6, 2021

Any E-bike would be incomplete without a battery. It is one of the vital and expensive components.

The battery determines how long you can use the bike without needing to be recharged, and most importantly, you will get to know how long it will work and work on other aspects.

If you do not know how to choose an Electric Bike Battery, read this article till the end, and you will become a master of it.

If you are purchasing a new e-bike, choosing a decent battery is critical since it impacts the efficiency of the bike and the distance it can ride on a single charge. However, even the performance of the different batteries can significantly vary even if they have the same size and weight. And it is because there is a difference between the kinds and structures of batteries.

Each battery has specific charging, voltage, time, size, weight, and capacity. The most used and optimal battery for an e-bike today is the Li-ion battery. This type of battery has the overall weight and power of any other battery type. The best of Li-ion batteries is that it is the highest form of battery currently available in the market.

On the other hand, Lead batteries are the oldest version used less than nowadays. The prime reason behind this is the low capacity and weight that make the e-bike heavier than now. Additionally, it takes a long time to recharge its batteries and has a short life.

So, which battery is the most effective? What is the best way to select the correct battery for your e-bike? These are the kinds of questions that might be running through your head right now.

In today’s Electric Bike Battery Guide, we’ll go over the battery in great detail and make sure you understand every aspect of it.

How Do Electric Bike Batteries work?

How Do Electric Bike Batteries work?

The primary aspect is that you need to know a few things about electric batteries.

  • A battery is essential for an electric bike.
  • How long your bike could go depends on the size and structure of the battery.
  • The battery needs to be recharged after every 30-50 miles
  • Electric bike batteries come in different sizes and designs and could be found in various bike parts.
  • You can remove the battery from the bike to recharge it or store it safely.
  • The power output aids in the rotation of the electric motor and also drives it forward.

There are two primary batteries usually used in most electronic bikes on the marketplace, such as Lithium-ion (the same kind of battery used in smartphones and other electronic gadgets). Another is a sealed lead-acid battery (the same type of battery used in cars).

In this section, we will go a little brief on both batteries, so you can quickly identify how they work and what kind of battery is most effective to use and buy.

Lithium-ion Batteries

As we said earlier, Lithium-ion is the most used battery in electronic bikes. It is because it has advantages such as being light in weight, being safer to use, and the capacity to stay long. However, this has a significant disadvantage also that it is expensive.

The uses of these batteries are becoming common in most electronic bikes, and it is because these kinds of batteries have reduced the overall manufacture cost.

The most famous e-bike batteries are LIFEPO4, one of the heaviest and most expensive batteries and among the safest batteries in the market. Apart from that, LIMn204 and LiNiMnCoO2 batteries are also available with a mild range of Lithium batteries.

Advantages of Lipo Batteries

  • It is small in size
  • You can fit a lot of Lipo Batteries on the bike’s frame
  • It will give your motorcycle some incredible and impressive range
  • It could add potential to run through 30-50 miles without being recharged
  • These batteries come with unique features that make them easy to attach to bikes
  • They endure a much longer life compared to Lead-acid battery

Sealed Lead Acid Batteries

Sealed Lead Acid Batteries

These batteries are often known as SLA batteries. They come in rigid plastic cases that can spin in any direction without causing acid to leak out the bottom. As a result, they are suitable for use with e-bikes. Thus, these batteries are less expensive compared to Lithium.

However, SLA’s batteries are far heavier than lithium-ion batteries, with some weighing as much as 20 pounds. Also, they are more dangerous due to the deadly lead that is trapped within the sealed cells.

These batteries are the same as those found in automobiles; the same safety precautions taken when handling a car battery should also be considered when running an electric bike sealed lead acid battery.

Advantages of SLA’s batteries

  • It is lower in cost, which means it could be affordable for everyone
  • The price is relatively low than Lipo, along with easy to buy options
  • They have higher output potential and could give heavy currents.

Which is best?

Well, the decision is all up to you. Both batteries have their pros and cons, but Lipo batteries are more convenient than SLA’s in expert opinion. But if you want to try out different batteries, then SLA is best to use.

How strong can electric bike batteries be?

How strong can electric bike batteries be?

One of the significant aspects that most potential buyers overlook when purchasing a bike is the battery.

Ultimately, the size of the battery decides how strong electric bike batteries can be. In addition, the size of the batteries determines how much speed, how much range, and how long it does last with you.

The majority of bikes in the market are powered by 36-48 volts, and they are offering the best speed, great lifespan, and speed. The best about these batteries is they are known for their climbing performance in comparison to conventional bikes. But Juiced Bikes is one of the few e-bike brands that solely use 52-Volt batteries, which have a higher capacity and are used throughout our complete line of products.

In simple words, the higher the voltage would be, the higher speed, range, and more efficiency would impact the quality of ride.

However, the 52 voltage battery system is nowadays used by companies to give away smooth and high-level performance compared to standard bikes like 48V. So, over the last few years, Juiced bikes are built with the necessary infrastructure with a 52V battery.

Perks of using 52V Electric bike battery

Great power

Power is primarily equal to amps multiplied by voltage; higher voltage equals greater output power.

Great speed

When the voltage is high, electric motors naturally spin at a quicker rate. As a result of our higher voltage systems, all of our e-bikes can achieve Class 3 performance, with some models reaching 30MPH while still offering the excellent hill-climbing torque that e-bike fans seek.

Great range

With 52V batteries, it provides an unbeatable value in the e-bike market. Moreover, it offers significant differences between the 48V and 52V systems in terms of performance or riding.

Great efficiency

With a higher battery voltage, the rider obtains more power and quicker speeds while drawing less current from the battery, resulting in greater efficiency.

So, how strong your battery depends on how much voltage package you have.

How long do they last?

How long batteries last?

When it comes to choosing a battery, this is the most common question that runs through in the head of every biker/cyclist.

However, most of its components will wear down, depending on how much and long you drive. But batteries have drawbacks; they start losing their capacity over time, even if they use little.

So, the most important thing you need to look into while buying a battery is to buy the best brand that lasts longer.

Unfortunately, in recent times the average cost of a battery is often one-third and sometimes half of the total price of a bike. So, to get the most out of the bike, one should follow the tips for increasing its lifespan.

Here’s how you can care for the batteries.

  • Keep your batteries in a cool, dry location where the temperature stays between 59F and 68 F or 20 C-21C
  • When storing it for an extended time, keep it between 40-80% of its original capacity.
  • Keep away from ultra-fast chargers that promise to charge batteries in less than an hour.
  • Do not put unnecessary stress on the battery since doing so will lower its capacity significantly.
  • Keep your battery from being completely discharged frequently. 

How much does it cost to charge an electric bike battery?

One of the cheapest transportation sources nowadays is electric bikes, which somewhat contribute to saving our environment.

As a potential buyer, you must want to know how it costs to charge an electric bike battery.

The average cost will be 4-12 cents to charge an electric bike. However, the cost can vary from battery size, capacity, range, speed, and current price.

If you want to check the cost per charge personally, follow the given steps.

  • To calculate watt-hours, multiply the voltage (V) by the amp hours (Ah), Wh.
  • Kilowatt Hours are calculated by multiplying the Wh by 1000
  • Multiply the KWh by the rate per kWh charged by your local electric company.

How long do I have before I have to replace the battery?

when to replace battery

If your bike battery needs replacement, the average time will depend on your skills and knowledge. 

Like other electronic gadgets, e-bike batteries need to be replaced after a certain period. However, the lifespan depends on the usage. Once they follow, the battery will last longer than its given time.

On the other hand, changing the battery provides a stable, smooth ride and no issues. But changing batteries sometimes won’t be possible due to its high price.

Thus, we share a short guide or tips that would help you get the most out of it. But, before that, let us know how to change the battery.

How do you change the battery?

  • Unlock the battery pack; you could do this with the use of a key or by unscrewing the nuts.
  • Any wires that may be linked to the battery should be disconnected.
  • Carefully remove the battery from your bike, support it with your hand to keep it from falling over.
  • Install the new battery and secure it in place with a bolt.
  • Ensure that all of the clamps and everything else used to hold the previous batteries are securely reinstalled.
  • Now reconnect all of the cables securely.
  • Congratulations! You have installed the new battery.

Some warning signs of changing electric bike battery:

  • End of its lifetime, which is 3-5 years
  • If the battery is physically damaged
  • Unable to charge
  • Reduce its speed, range, and battery life
  • If the battery is swollen
  • If the battery is hot
  • If the battery producing a foul odor

Things to keep in mind while changing the battery

  • Must check the battery type
  • Don’t forget battery group size
  • Analyze the range and capacity
  • Battery life claimed by the maker
  • Brand
  • Price
  • Battery warranty
  • Quality of the product

How to charge the battery?

how to charge ebike
  • Leaving your battery charged at high temperatures will destroy your battery.
  • Move your e-bike indoors, where it will be cooler if it is 80 degrees outside and you have the battery fully charged.
  • It would be best if you tried to drain the battery as soon as possible.
  • If possible, charge your battery at room temperature.
  • The slower the charge rate, the better it charges.

By following the tips mentioned above, you can quickly increase the lifespan of your e-bike batteries.

The Bottom Line

We hope you found the best information you were looking for. So, follow the above guide and get the most out of your electronic bike.

When properly taken care of, e-bike batteries can last for an extended period without causing any trouble. However, you should understand the type of battery you are dealing with before taking the steps for protection and maintenance.

We hope we have shared all the info you would need. If you have any questions, write to us in the given comment box.


Noel Joseph

Noel Joseph has been in the world of motor vehicles for a long period. Currently, he is enthusiastic about Electric & Hybrid Motors and is an independent researcher. He advocates for a clean and sustainable future and envisions utilizing his years of experience in mechanical engineering. His new venture here at CompactPower.com is to organize and simplify knowledge on Electric vehicles. He wants to build a space where people can talk about EVs and associated technologies with freedom.