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The Mighty Max 12V 100Ah LiFePO4 is a deep-cycle lithium iron phosphate battery built for solar storage, RVs, trolling motors and backup power. It delivers roughly 100Ah of usable capacity, holds voltage steady under load and weighs far less than a comparable lead-acid battery. Its built-in battery management system guards against overcharge, over-discharge and short circuits. Against premium brands like Battle Born and Renogy it competes on capacity per dollar, but it lacks the low-temperature cutoff and Bluetooth monitoring some rivals include.
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Lowest price we've seen: $300.00 on Nov 9 at Lowe's. Tracked across 1 store since Nov 9.
Owners generally report solid capacity and stable voltage for solar, RV and trolling motor setups, and many praise the weight savings over lead-acid. Complaints center on cold-weather charging limits and the lack of smart monitoring.
