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1. Select the appropriate voltage and connector for the electronic device to charge / power supply
2. Press the switch to start charging when your device connected with the power bank. If you unplug the cable, auto-sleep will start in one minute
3. Five LED lights will flash circularly during the charging and all lights will keep bright when your device is full-charged
4. During charging for your device, LED lights indicate the balance power of the built-in battery. Four lights indicate 80% balance, three lights indicate 60% balance, two lights indicate 40% balance and one light indicates 20% balance. The built-in battery is empty when all LED lights start to flash
5. Press the switch five seconds to start If you want to use LED for illumination and select the status (light, strobe, SOS, close) by pressing the switch to transform
6. Store the product in a cool and dry place and away direct sunlight