... ,battery case for iphone ,speaker for iphone,3d case for iphone2,Features: (1)3in1 power case for iphone 4/4S: with protecter case,emergency charger and speaker function. (2 ... cells type (1), polymer lithium-ion batteries, standard voltage 3.7 V (2) the capacity: 1800 mAh (3) the output voltage: DC5 ... output current: more than 700 mA (0.7 A) (5) input voltage: DC5 V + /-0.2 V (6) the input current: more ...