Portable battery power bank compatible with EinScan Pro Series / H Series. The capacity of the battery - 20100 mAh. Has a USB 2.0 connector QuickCharge 2.0 and USB 2.0, with an output voltage of 5 V / 2.1 A. Charge PowerBank is via the connector microUSB using most cell phone wall chargers. Computer still required for mobile scanning.