Home Lifestyle What You Need To Know About Ebike Batteries

What You Need To Know About Ebike Batteries

by Jasmine

When it comes to the cost of an electric bicycle, the battery usually takes the cake. Unfortunately, the tremendous demand from newly released EVs has prevented the price of 36v ebike battery from falling as quickly as hoped. However, you’ll discover a wide range in cost among battery packs with almost identical features.

When discussing technical details, two primary numbers typically come up: voltage and wattage (Ah). Power is measured in watts (W) and indicates how much energy can be drawn from the battery.

What Is Inside?

Most batteries are built with a similar set of internal components; they are composed of several LiIon cells, originally of the 18650 sizes but now frequently of the more significant 21700 kinds. It is a BMS that is linked to them.

The BMS monitors for cell failure by measuring the voltage differential between the various battery packs. It can also maintain some degree of cell equilibrium when charging. The battery will be disconnected from the system by the BMS if it senses a malfunction, preventing any further harm.

To detect potential issues early on, sophisticated BMS boards with wireless or cable interfaces are available on the market. Yet this is also what pushes up the price of these batteries.

The Shape of A Battery

Battery housing is often tailored to the intended use of the frame mounting location. You may get stuck in cases and various individualized issues on the market. An electric bike’s aesthetics are enhanced by having a bespoke housing that fits snugly into the frame.

Sure, batteries are discreetly integrated within the down tube. But there is a limit to how much space you can add with modification; these packs can’t match the storage capacity of a standard case.

Battery compatibility between brands is also an issue to think about. It would be nice if you could switch out batteries between bikes if you considered buying two, even if they were different types. However, various bike models frequently employ varying kinds of the casing.


We only utilize high-quality cells from trusted manufacturers like Samsung, Panasonic, and LG. The dimensions of the cells—18 millimeters in diameter and 65 millimeters in length—form the basis for the 18650 and 21700 standards, respectively.

Between 3000mA and 5000mA is the typical cell capacity for bikes. Many cells will be connected to enhance the power and get the desired result; for example, four 21700 cells will be connected to achieve roughly 20Ah. To generate 36V, link ten parallel cell packs in series for 40 cells and 36V. This will yield a 20Ah battery pack with 36V.


We suggest discharging the battery to around 50% and storing it in a relaxed environment (20C) if you won’t use your e-bike for an extended time.

Studies over longer periods demonstrated that a small quantity of gas is produced at the positive electrode when Li cells are ultimately charged. This elevates intracellular pressure and resistance. Eventually, the cell will become so degraded that its usefulness will significantly diminish.


A new battery’s cost must be factored in if you plan on keeping your e-bike for more than five years. If you break something, you may always ask the store how much it would cost to replace it. It would be unusual to pay more than $800 for a 16Ah battery.

Supporting a well-known brand may result in you paying more than usual, but if someone attempts to take advantage of you, you should know better.

You may also like

Leave a Comment