... , short circuit, lightning protection, etc function. Easy to use:1, Charge the power bank 1-1, use ... USB cable6 connectors for different mobile. (please refer to the picture below, select 1 ~ 6 connectors which ... using, please do charge the power bank over 9 hours to extend it's lifetime. 2, make sure the ... please release all the energy of power bank to extend the lifetime. Need full charge/discharge at ...