OPTIMATE 1 DUO. It automatically turn on and off to keep your 12.8V/13.2V LFP Lithium battery or 12V lead-acid battery in the perfect condition and extend its life. Maintain any type of 12-volt lead-acid battery without overcharging, filler cap / wet cell sealed AGM (MF) or GEL and 12.8/13.2V lithium (LiFePO4) batteries.
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