Battery Tender Quick Disconnect Usb Charger Adaptor With 12v Input And Maximum 2.1 Amp Usb Charging Output. A Portable Solution For Charging Your Usb-connected Mobile Device Using Your Vehicle’s 12v Battery.designed For Use On Most 12 Volt Batteries - Motorcycles, Golf Carts, Atvs, And More. Simply Plug This Adaptor Into The Battery Tender Quick Disconnect Cable Installed On Your Vehicle And Charge Your Device With A Usb Charging Cable. Great For Charging Your Phone Or Gps When You're Out For A Ride!