Pro Series Chargers are the #1 choice of over 50 boat manufactures and the pro fisherman on the B.A.S.S. and FLW tournament trails. These chargers are totally waterproof and shut off completely after charge. No trickle charge. Return to charge maintenance mode. They are temperature compensated to assure you fully charged batteries under all amospheric conditions. Separate chargers in every bank enable each battery to be analyzed, charged and maintained individually to ensure peak performance. No installation restrictions. Ignition protected. Meets FCC Part 15. CE Approved.