Compatibility: The adapter is compatible with 20v lithium battery. converting your battery into Mobile Power Supply System (Battery NOT Included) ABS materials are more environmentally friendly and reduce human hazards.comes short-circuit, under-voltage, over-current protection, status indicator prompts, the power source adapter is compact and safe to use USB Port/Type C port: Built-in USB Ports provide maximum 5V 2.1A speed chagrining for two mobile devices simultaneously, charging for your phone, tablet, headphone, etc. The Minimum output current is 0.5A For necessary for camping , walking at night, and sudden power failure. USB converter for battery Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Colour:Yellow Material:Plastic Package Contents: 1x Power Source Converter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.