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Loss of power to charge more than 12 hours, if the battery charge capacity is large, the charging time will be longer. Almost all chargers on the market have multi-color indicators, when the battery is being charged, it will show red, and if it is full, it will directly change to green. When fully charged, it is necessary to turn off the charger in time, otherwise the fine particles on the surface of the active substance of the electrolyte are easy to fall off, and serious oxidation of the grid frame will occur