The GENM1 On-Board Smart Battery Chargers are rugged and compact waterproof chargers for 12-volt lead-acid batteries. They can be mounted onto virtually any vehicle, like a boat, car, tractor, or RV. Safe to leave connected indefinitely; the GEN Mini interactively diagnoses, recovers, and charges Wet, Gel, MF and AGM batteries chemistries from 20-120Ah and maintains all battery sizes. The GEN Mini is a smart battery charging solution for rugged environments, and includes multiple innovative features, such as: 100% waterproof design, automatically recovers sulfated batteries, charges multiple battery chemistries, designed for user safety, protects against abnormal conditions, small, compact design, optimizes a batteries specific gravity, charges 2X faster than traditional chargers, works with varying AV voltages, and ignition protected. GEN Mini On-Board Smart Battery Chargers are rated at IP68, ETL Approved for United States and Canada, and comes with a 5-Year Limited Warranty.