OptiMate 2 DUOOptiMate 2 DUO BRONZE series: 5-step 12V / 12.8V 2A sealed battery maintainer.The powerful ‘no brainer’ battery maintainer for the hi-technology battery in any of your vehicles. Guarantees healthy lithium or lead-acid batteries!Ideal for 12V lead-acid & 12.8V / 13.2V lithium LFP (LiFePO4) batteries.Delivers 2 Amps charge current recommended for maintenance of larger batteries.Charges and delivers long term maintenance. Connect to the battery and OptiMate 2 DUO does the rest, no supervision required!DUO: Adapts automatically to Pb or LFP battery.Safe to leave connected. Full electronic protection.24/7 Maintains battery at full charge and good health.Low Volt Start of 4V.Warns when battery damage is detected.Green Technology: Energy saving technology, Stand-by power less than 0.5W and Efficient 24-7 battery maintenance.IP54: Weatherproof. Rated for use down to -40°C / -40°F.