The compact GENIUS2 charger by NOCO is designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries. An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate overcharging in hot climates and undercharging in cold climates. Charges dead batteries as low as 1-volt. You can also use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts. Simple to set up and use. Restore your battery- Detects sulfation and acid stratification and restores lost performance for stronger engine starts and extended battery life. 1-year limited warranty. Can be used with cars, motorcycles, lawnmowers and more!