The HART 20V Power Source/Inverter is the perfect tool for making sure you have power when you need it most. This Power Source/Inverter allows you to charge your devices using either a 120V outlet or the 2 USB ports. By using a HART 20V 4.0Ah battery (Battery Not Included) this power source can charge a cell phone from empty to fully charger up to 6 times. The ideal uses for this tool are for laptops, tablets, smart-phones and other small electronics. An integrated LED light can be used as a flashlight for enhanced visibility in case of a power outage. This power source uses any HART 20V Lithium-Ion battery (Battery Not Included) to charge and provide power for your small electronic devices with fade-free power to use when you need it most.