Selectable battery type: Wet, Gel, and AGM Sealed Lead Acid. Calcium battery rejuvenation (desulfation) function. Maintains, extends battery life, and never overcharges. Conditions your battery and fights sulfation while charging. Quick-disconnect battery clips and ring terminals. Ideal for winter battery maintenance Heavy-duty cables. Protected for: short circuit, reverse polarity, and overload. Internal thermal overload protection and battery thermal runaway protection.