Versatile, fully sealed automatic battery maintainer Automatically saves, charges and maintains 12.8V/13.2V lithium (LiFePO4/LFP) or 12V lead-acid (STD, AGM and gel) batteries Adaptive charge program adjusts to the battery type and condition OptimateÆs 24/7 smart maintenance guarantees more battery power and longer battery life. CHARGER OPTIMATE 2 DUO X4