OptiMate 2 DUO x 2 Bank BRONZE series: 5-step 12V / 12.8V 2A sealed battery maintainer x2.. The powerful ‘no brainer’ 2-bank battery maintainer for the hi-technology battery in any of your vehicles. Guarantees healthy lithium or lead-acid batteries!. Ideal for 2x 12V lead-acid & 12.8V / 13.2V lithium LFP (LiFePO4) batteries.. Independently charge, test and maintain 2 x 12V lead-acid (STD, AGM, GEL) / 13.2V lithium LFP (LiFePO4) batteries. Batteries are always ready to perform.. 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 dual bank 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..