Meet the NOCO GENPRO10X3 . our most rugged . compact . and powerful . onboard marine battery charger we have ever made. The GENPRO10X3 is designed to charge and maintain up to three (3) 12-volt lead-acid and lithium-ion batteries . including flooded . gel . AGM . and deep-cycle batteries. Each 12-volt battery bank provides up to 10-amps of pure charging power . plus doubles as a battery maintainer and battery desulfator. Included is a GENPRO10X3 30-Amp 3-Bank Waterproof Onboard Marine Battery Chargers (120-240VAC) . Self-Tapping Mounting Screws . User Guide . 3-Year Warranty and certified to UL1236 . ISO 8846 . and 33 CFR 183.410.