This smart safety design prevents spills, protects the pump, and lets you refuel with complete peace of mind—no need to watch over the process. Fuel Transfer Pump Battery-Powered: 12 GPM Electric Diesel Transfer Pump with 2 X 21V 4.0Ah Batteries, Portable Cordless Pump Kit with Auto Shut-Off Nozzle & 2X6.6 FT Hoses for Diesel Kerosene.