Powerful 1500m Ah Li-ion battery charges phone battery & doubles runtime Plug in & keep using your iPhone iPod whilst it recharges Mini USB (Universal Serial Bus) port for data sync & battery recharge Supplied with 1-metre USB (Universal Serial Bus) A male to Mini USB (Universal Serial Bus) B cable Battery level indicator on side of unit Input 5V 500m A output 5V 500m A Over-charging & short-circuit protection