The NOCO 6-12V 3.5 Amp Battery Charger is perfect for charging cars, boats, trucks, ATVs, lawn mowers and more. It is extremely effective for maintaining automotive, marine, RV, powersport, lawn and garden and deep-cycle batteries. The compact, yet powerful form factor, allows it to charge batteries 2X faster than ordinary chargers, and it is one of the safest, most advanced chargers on the market. Use the advanced diagnostics to automatically test and detect a bad, damaged, or shorted battery. The charger will charge fully drained lead-acid and lithium-ion batteries up to 120 amp-hour with zero overcharge. This charger will charge 6-volt and 12-volt batteries, recover damaged batteries, is suitable for micro-hybrid start-stop vehicles and works with CANBUS electrical systems. It can stay safely connected 24/7 because it actively monitors battery for safe and efficient charging and also includes spark-proof technology and reverse polarity protection.