20.8Ah/10.8V Automotive-Grade Lithium Battery Remote Management and Maintenance via the VIG app or VIGI Cloud VMS Intelligent Auxiliary Heating Technology Ensures Optimal Battery Performance in Extreme Cold Weather Maximum Power Point Tracking (MPPT) Charging Controller Increases Charging Efficiency by 20%* Over-charge, Over-discharge, Over-current, Overheat, and Short-circuit Protections Remaining Capacity > 70%** after 500 Cycles IP66 Weatherproof