USB Power Source Addon for Bosch GKS 18 V-LI Battery - Phone and USB Devices Charger Accessory for Bosch 18V Lithium-Ion Power Tool USB Power Source Addon for Bosch GKS 18 V-LI Battery Battery NOT Included. This is only for the USB Power Source. The USB Power source attaches to your lithium-ion battery and will enable you to charge your phone and other USB devices. USB Power Source Specifications - Input Voltage: 11.3-22 VDC; Output: 5V/2.1A USB Power Source includes 2 USB Ouput to charge your phone and other USB devices. On Sale for a Limited Time!