The rechargeable li-ion battery for the iSavi IsatHub has a 3 ampere-hour capacity for the Wideye Isavi IsatHub device. This battery can be charged even when it is disconnected from the iSavi unit by plugging it into the Wideye AC or DC charger (not included). It provides 2.5 hours of use with the standard battery when it is at full transmission power and 24 hours of idle standby time. It is a 3 cell battery.