Program steps for each independent charging bank - STEP 1: Low Volt Start (0.5V). STEP2: Ultra LOW VOLT SAVE. STEP3: LOW VOLT SAVE / cell monitoring. STEP4: TEST – cell damage. STEP5: Cell-balancing CHARGE. STEP6: OPTIMIZE. STEP7: TEST after CHARGE. STEP8: OptiMate maintenance. The 4 bank OptiMate Lithium 0.8A 4S charges up to 4 x LiFePO4 / LFP (Lithium Iron Phosphate) 4-series batteries with nominal voltage of 12.8V – 13.2V. Each bank charges independently and includes the following features: †Saves low voltage LiFePO4 batteries. †Specialized LiFePO4 charge cycle. †Maintains & protects LiFePO4 batteries. †Battery BMS reset. SAFE: No risk of overcharging. Totally safe for vehicle electronics. Sparks suppressed. Safe for long-term battery maintenance. Automatic shut-down if short-circuited or battery disconnected. 3-year limited replacement warranty.