Promariner Promite Chargers - $35.88

The ProMite delivers all of the charging and conditioning capability ProMariner chargers are known for in a small, powerhouse package. Automatic multi-stage charging brings your batteries to full charge and keeps them there without overcharging or overheating. They are saltwaterproof with a shock-resistant housing for superior durability. And they have built-in safeties for reverse polarity, ignition and temperature, along with at-a-glance LED power and charging indicators. Each is optimized for lead-acid and gel batteries. Cable lengths are 6-foot. One-year warranty. - $35.88