Scientific maintenance can greatly extend the service life of 12V65Ah lead-acid batteries. Place the battery in a dry, ventilated and clean environment with a suitable working temperature of -15℃ to 50℃, avoiding high-temperature exposure and low-temperature freezing. Conduct regular appearance inspection, clean surface dust, check for shell leakage and terminal corrosion or looseness. Maintain the floating charge voltage at 13.6-13.8V. Detect internal resistance quarterly and activate the battery timely if the resistance exceeds 100mΩ. For long-term storage, recharge monthly and perform equalizing activation every six months to prevent power deficit and permanent capacity attenuation.