Opti Mate PRO-1 DUO. PRO series: 12 V 10 A diagnostic battery charger tester & power supply. Opti Mate PRO-1 DUO, the professional combination charger tester & power supply for powersport & small craft/machine professionals, repair shops & battery retailers. Features Suitable for new or used 12 V lead acid (3-50 Ah) & 12.8 V/13.2 V Li Fe PO4 (2-20 Ah) batteries 3 choices: Choose a charging mode for 12 V lead-acid OR 12.8 V Li Fe PO4, or select power supply mode for battery support during vehicle diagnostics, tuning or troubleshooting Automatic quick battery activation: a flashing green test light indicates that the battery is healthy & sufficiently charged Intelligent recovery mode for deeply discharged batteries, a bad battery is quickly identified, a good battery is charged & then retested Push button activated BMS recovery for Li Fe PO4 batteries Test battery indicator for GOOD (80 to 100%), OK (60 to 80%), & POOR (below 60) Power supply mode provides constant power for vehicle tu...