Iwalk extreme ubs5200d dual usb rechargeable 5200mah backup battery black for smartphones and tablets rechargeable compact universal backup battery impressive 5200 mah lithium ion battery with dual usb ports charge 2 usb powered devices simultaneously 21a rapid charging port to charge your tablet smart circuit protection design keeps your devices from overcharging dc in out port features dust proof cover emergency flashlight on back just press and hold power button physical pack quantity 1 el