Most of the e-bikes come with a removable battery. Removable battery allows you to take the battery and charge it at a place of your choosing. In the current market there are many 36-volt 10ah and 36-volt 14ah batteries available for eBikes and 48v/60v systems for eScooters. Most of these batteries use cylindrical format 18650 cells. Some of the batteries do use pouch cells but those are very rare. http://www.qspowerbattery.com/e-vehicle-battery/two-wheels-battery/