OptiMate 7 Select: GOLD series 12V 10A battery saver, charger, tester & maintainer

AmpMatic: smart current control technology automatically adjusts current between 10A and 1A to charge any size of 12V lead-acid (Pb) battery - smaller battery gets less current, bigger battery gets more! T°-Matic: Automatic temperature regulation: Charge voltage (14.4V / 14.7V) & maintenance/float voltage (13.6V) set at default temperature of 25°C, with adjustment of -18mV / °C above or below that. ADVANCED: default 14.4V charge voltage works for most batteries, no selection required, OR select 14.7V for performance AGM or DEEP-CYCLE batteries and the 9-step smart program does the rest automatically! SMART Selection: Selection remains in memory after you disconnect from the battery or if disconnected from AC power. No supervision required! SAFE: Smart electronics protects against accidental reverse polarity connection. No sparks if clamps touch as the output remains off until connected to a battery with voltage.