The Milwaukee 3841 20 M18 Jump Starter uses capacitor technology to deliver fast, maintenance free jump starting with readiness in under 70 seconds. It provides up to 2000 peak amps and can jump engines up to 8.1L gas and 3.0L diesel. Designed for all weather use, it operates from minus 4 F to 122 F and offers long life with capacitors rated up to 500000 cycles. When paired with M18 REDLITHIUM XC50 batteries or higher, it delivers up to 70 jump starts per charge. Safety features include spark proof clamps, reverse polarity protection, overheat protection and a digital voltage display. The unit is IP65 rated for durability in demanding environments.