● First pull out the top cover.
● Slide your phone gently into the the battery case, and make sure the phone is well connected to the micro USB 2.0 connector of the battery case.

To charge the battery case:
● Connect the charging cable to the battery case’s USB input interface, and then connect the cable to a USB charger.
● Press the power button once to charge the phone and battery case simultaneously. The battery case is fully charged when all four LED indicator illuminated and stop flashing.

Notes:
● When charging the battery case with phone attached, the phone battery will be charged first. After the phone battery is fully charged, charging of the battery case will begin.
● When charging the battery case with phone attached, data transfer is supported. Type: Backup Power Banks
Connection Type: Micro USB Package weight: 0.192 kg
Product size(L x W x H) : 16.4 x 7.5 x 1.0 cm / 6.45 x 2.95 x 0.39 inches
Package size (L x W x H): 22.0 x 11.0 x 2.5 cm / 8.65 x 4.32 x 0.98 inches Package Contents : 1 x 4200mAh Backup Battery Power Case, 1 x English User Manual