OptiMate 3 x 2 BankOptiMate 3 x 2 Bank 7-step 12V 0.8A sealed battery saving charger & maintainer x2.The fully sealed 2-bank battery saving charger & maintainer for 12V AGM, GEL or STD batteries.Ideal for 12V lead-acid (STD, AGM, GEL) starter or deep cycle batteriesCharge banks are electrically isolated from each other and operate independently. Charge batteries separately or charge batteries connected in series!Fully automatic multi-step program brings the battery safely to full charge. Connect to the battery and OptiMate 3 does the rest, no supervision required!Diagnoses sulphated battery condition.Saves your ‘dead’ battery from as low as 2V.S.O.H.: Tests battery state of health.Safe to leave connected. Full electronic protection.24/7: Maintains battery at full charge and good health.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.