Battery Tender Charge N Start 4 Amp Charger & 1200 Amp Jump Starter

The Battery Tender Charge N Start 4120 is a 2-in-1 tool that combines a 1,200-amp jump starter with a 12V/4-amp smart battery charger and maintainer. It jump-starts up to 6.0L gas and 4.0L diesel engines and keeps cars, motorcycles, ATVs, and boats ready to go.

Its Auto-Switch technology automatically maintains both the vehicle battery and the internal jump-starter pack, so both stay charged. Microprocessor-controlled charging adds spark-proof connections, reverse-polarity protection, and temperature compensation for worry-free use. The kit includes heavy-duty smart clamps, a storage case, and a built-in LED light.