10-step 12.8V 10A sealed battery saving charger and maintainer The fastest professional battery charger for 12.8V/13.2V (LiFePO4/LFP) performance/race batteries Includes a TUNE mode for diagnostics or updating programming Automatically and safely charges, tests and maintains LiFePO4/LFP or deep cycle batteries Ampmatic charge control adjusts current to match battery size and condition Low-volt start of 0.5V Pushbutton-activated BMS wakeup mode safely wakes battery out of sleep mode or low discharge Smart, 24/7 interactive maintenance prevents discharge from connected circuitry. CHARGER OPTIMATE 4S LITH