Eventually electric bike batteries need to be replaced as their lifecycle comes to an end.
You can tell when a battery is nearing the end of its life when it does not provide you with much range.
This guide will help you with ideas on how to get a replacement electric bike battery.
First of all, if you have a complete electric bike you should buy the replacement battery from that e-bike company. Typically you can get a replacement from your local dealer but in some cases you may need to contact the e-bike company directly.