SPECIFICATION: Housing:Aluminum Battery Type:2000mAh rechargeable 18500 Li-ion Battery Charging time:4 hours full charging Running time:Up to 10 hours Jump start voltage:9V 0.2 seconds Battery safety:Microchip battery controller which prevents short circut,over charge,over current or battery drain. Packing includes: 2X Batteries,1X Charger Plug:EU/US Warranty:1 year Removeable Battery Mechanism. OPERATION: Long press power button to power ON/OFF without JumpStart voltage feature. Quickly double press power button to power ON or OFF with JumpStart feature. Turn on the machine will display the previously adjusted volt. Press power button for Start/Pause the machine. Start to timing when is power on.Reset the timer when is power off.Pause the timer by pressing the power button. 1~100% capacity display. If there is no activity for 5 minutes,the unit will automatically power off. FAULT CODE Short circuit code display E1 Over current code display E2 Please reboot for activate.