Compatible for iPhone 5 5s se / 6 6s / 7 / 8 (4.0inch & 4.7inch phone)
Also fits for iphone 6 7 8 plus X, but only charging 80-90%. you could choose our MP282P 4500mAh.
1,When you use, it starts normal charge.if you wanna QUICKER charge, please holding on/off button for 3 seconds.
2,the backup battery only accepts <1mm thickness cases, please refer to the cases we sent you.
3,Slowly move your iPhone along the battery board until both connecting properly.