... spray-finishing, bright colors.2.install high quality li-ion battery,fully power supply.3.dual circuits protective ic ... charge.How to know the remain power.Press the button, LED lights will turn on to indicate the ... the connector and USB cable.3. Keep pressing the button for 3 seconds, LED lights turn on, the ... to charge.4. After charging, keep pressing the button for 3 seconds to turn off the charger,5. ...