Do not store in a state of power shortage. The state of power shortage refers to that the batteries of electric golf cart, electric sightseeing car and electric dining car are not charged in time after use, which is prone to sulfation. Lead sulfate crystals attach to the electrode plate, blocking the electric ion channel, causing insufficient charging and battery capacity decline. The longer the power loss state is idle, the more seriously the battery is damaged. When the battery is idle, it should be charged once a month, which can extend the service life of the battery.