Most good quality e-bikes have a lithium battery (avoid lead-acid battery). The life of the battery is linked to the battery charging cycle. A charge cycle is a process of charging a rechargeable lithium battery.
Batteries like Samsung, LG, Panasonic may have around 600 charging cycles indicating that in a standard use case, the life of the battery may range anywhere from 2 to 4 years depending upon how well it is maintained. It’s normal for a lithium battery to slowly lose its storage capacity over a period of usage time.
Please refer to our FAQ Electric bike/scooter charging tips for long battery life for more information.