ProMariner ProNautic 1250P Vented Battery Charger 50 Amp - 3 Bank The ProMariner ProNautic Series of vented battery chargers were designed for the growing demand for more 12 volt electronics on board todays power, sail, cruising, and sport fishing boats. The ProNautic ProMar Digital Performance Charging Platform combines digital control and software-based power conversion technology with global energy management features. Boasting twelve digitally-controlled performance charging profiles with fi