Maxxlee Smart Battery Charger is one of the safest and most advanced on the market. It uses state of the art technology, the battery charger with 9 steps enables the re-charging of batteries to almost 100% of their original capacity. It can automatically diagnose, recover, charge and maintain batteries for months, fully automatic operation from Charge to Maintenance modes. It features a 9-Stage charging strategy, i.e. 1.5A-10A-7.5A-5A-4A-3A-2A-1.5A Maintenance & 13.6V/5A Power Supply. It comes with over heat protection with mini cooling fan inside and it is fully protected against short circuit and wrong connections. Features: Battery capacity: All types of 12V/24V Lead-Acid Batteries (Wet, MF, AGM and GEL) Reverse Polarity, Overcharge and Short circuit protection LED power and Charging indicators Supplied with two detachable and interchangeable color coded lead sets one with clamps for bench charging and one with eyelet terminals for permanent attachment to the battery posts to allow quick connection/disconnection through connector. Charging current: 2A/5A/10A for 12V batteries ; 2A/5A for 24V batteries; 13.6V/4A Power supply One of the safest and most advanced on the market. Designed to charge 12-volt and 24-volt LEAD-ACID battery only It charges 2x faster than ordinary chargers. It can repair damaged batteries, power DC devices and is designed for micro-hybrid start-stop vehicle and CANBUS electrical systems. It can remain securely connected 24/7 Efficiently designed, ultra-compact, portable and incredibly lightweight. Using state of the art technology, the battery charger with 9 steps enables the re-charging of batteries to almost 100% of its original capacity It can be used as a Power Supply to provide constant power to 12V DC appliances with 5A(max) output current.