This charger is over 6 times faster than the Optimate TM-471!! ***THIS CHARGER IS ALSO CAPABLE OF RECOVERING LOW VOLTAGE LITHIUM ION BATTERIES THAT HAVE NOT BEEN DAMAGED BEYOND REPAIR*** We have recovered batteries with a charge as low as 8.6 volts!! ***Results WILL vary*** A HIGH amp FULLY AUTOMATIC charger/maintainer for ALL 12v Antigravity Batteries as well as other brands of lithium batteries. • The most cost-effective solution for long-term maintenance of 12V lithium (lifepo4) batteries in any vehicle stored in or outdoors. • Fully Automatic “Plug and Play” – Simply connect to the battery and plug it into the nearest power socket, the rest is fully automatic. • Automatically brings the battery to full charge with 5 Amp constant current and then switches to the unique Optimate battery-saving maintenance charge mode to keep the battery 100% ready and at the same time provides power to the onboard computer, display or antitheft alarms. • Recommended for Lifepo4 lithium battery brands. • Weatherproof and lightweight weighs in at 1 lb. • Includes all safety features such as reverse polarity protection, no spark connection; approved to UL and CSA safety standards for automatic battery chargers. • We also offer a faster 5 Amp charging unit (Model TM-291) that provides testing and recovery of lithium batteries. • 3 year limited warranty. Manufacturer Info: 1. Pre-qualification test: OptiMate Lithium displays the condition of the battery before charging and measures environment temperature. The ampmatic™ charge program is selected according to temperature and battery condition. 2. Low Volts recovery: The safeTº protection mode controls charging during this sensitive battery SAVE stage, to ensure that an over discharged battery will be correctly and safely recovered. Tests are conducted through-out the SAVE program to determine if the battery has successfully recovered.