Tecmate Optimate 3 x 4 Bank, TM-455, 4-Bank x 7-Step 12V 0.8A Battery Saving Charger-Tester-maintainer The most TRUSTED battery charger in power sports in a 4-bank version. OptiMate 3 x 4, the all-in-one tool for 4 x 12V batteries care at home, in the workshop or in the vehicle storage facility! SAVE: Low Volt Start of 2V + 2 step desulphation recovery; CHARGING AMPS: 0.8A (constant current, per bank) Model TM-455 IDEAL FOR: 4 x STD, AGM & GEL 12V batteries from 3  50Ah. USE: Indoor / Outdoor (lowest temperature: -4F / -20C); STYLE: Weatherproof case with wall mounts, with 6ft / 180cm AC supply lead and 4 x 6ft / 180cm charge lead ending in SAE connector. 4 x Weatherproof battery lead & 4 x standard battery clip set included INPUT: Global (100-240V 50-60Hz), high efficiency (CEC listed), fully sealed.