The battery of the bike is prepared to have a sufficient autonomy to last about 80 km, using about a level 2 of assistance of the same. If you need more assistance, the battery will hold less and vice versa. As for charging the battery, it must be plugged in to be recharged with a special charger. It can be charged directly to the frame, or disassembled and removed to carry it to charge it wherever it is needed.