All POLARIS Electric Bicycles are powered by the EVantage ProRide Removable lithium battery. Our ebikes are designed to move you, not the other way around. For this reason we made all of our batteries removable and easy to carry. To recharge the ProRide battery, just pop out your ebike’s internal battery pack. ProRide battery pack can be charged both while in and outside of the ebike, allowing you to recharge anywhere. The battery slides conveniently in and out of integrated frame compartments. ProRide batteries have a LED indicator that will show you battery level when system is off, or during the charging process.