The Cat® 25 Amp High Frequency Battery Charger provides up to 25 Amps of automatic, multi-stage charging for 12 volt battery systems. The unit comes with patented features like 540 Watt engine start and alternator check. Other features include battery reconditioning and float mode charging. The unit also features an easy to read digital display for charging status, and has a visual and audible reverse polarity alarm with reverse polarity protection (no spark clamps). On board cord, cable and easy clamp storage.