The NOCO GENIUS 4A is a fully automatic smart battery charger, maintainer, trickle charger, and battery desulfator designed for 6V and 12V lead-acid and lithium-ion batteries. It is compatible with flooded, gel, AGM, SLA, maintenance-free, and LiFePO4 battery chemistries.

The charger features an integrated thermal sensor that automatically adjusts the charge rate based on ambient temperature, preventing overcharging in hot conditions and undercharging in cold ones. Its advanced desulfation mode detects sulfation and acid stratification, automatically repairing and reversing damage to extend battery life and restore performance. The unit is safe for continuous 24/7 connection with no risk of overcharging, making it ideal for long-term vehicle storage maintenance.

Compatible with a wide range of vehicles including cars, trucks, SUVs, motorcycles, ATVs, UTVs, lawn mowers, boats, RVs, snowmobiles, and classic cars.