Short Answer: No, using a lead-acid charger for LiFePO4 batteries risks undercharging, overcharging, or damage. LiFePO4 requires precise voltage control (14.2–14.6V absorption, 13.6V float) versus lead-acid’s higher float stages (13.8V). Mismatched charging reduces lifespan, voids… Can a lead acid charger charge a LiFePO4 battery?