The einhell te cp 18 li usb solo battery adaptor provides a practical and mobile power source for charging devices such as mobile phones tablets and mp3 players the adaptor plugs into a power x change battery providing plenty of power for charging it has 2 usb ports allowing 2 devices to be charged simultaneously for fast charging one of the ports is supplied with a powerful 21ah charging current bare unit no battery or charger voltage 18 volt power output usb port 1 10ah usb port 2 21ah weight