Optima builds deep-cycle (above, left), and dual-purpose (right) lithium marine batteries the author tested for engine starting and light "house" duty. Courtesy Optima Batteries Last fall, I replaced ...
Last fall, I replaced the two AGM dual-purpose batteries aboard my Regulator center-console with Optima Orangetop lithium (LiFePO4) technology. I had used Optima AGM batteries for 15 years with ...
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