Extreme Max 1229.4009 Battery Buddy PRO 6V/12V (1 Amp / 4 Amp) Water Resistant Battery Charger / Maintainer Water resistant battery charger and maintainer charges and maintains 6V (0.8 Amps) and 12V (0.8 or 3.8 Amps) lead acid batteries 4 Charging Modes (6V, Powersports, Automotive, Cold) Overcharge, short circuit and polarity protected Backlit LCD panel and LED reverse connection alert 1-year warranty