... /Y/W,accept individual logo OEM Portable back-up power performance:1.Features: mini design, fashionable style ... white, red, yellowOperation Instruction:While charging the back-up power, connect to either an external 5V-1A power ... and discharging; and likewise, cut off the back-up battery power while pressing the button for 3 seconds ... 20% battery power. Mini Type USB charger,portable mobile phone charger