Maintenance free: Open batteries produce gas and leak into the air during the charging process, while the electrolyte moisture decreases. So acid needs to be added regularly. With the sealed valve-regulated design of AGM batteries, the gas produced by internal water decomposition can be recombined back into the electrolyte during the discharge process, without the need to refill the electrolyte regularly. This makes it safe and reduces the labor cost required for maintenance.
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China Energy Storage Battery, Lithium UPS Battery, Lithium Power Battery Suppliers - JINGXIAN
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China Energy Storage Battery, Lithium UPS Battery, Lithium Power Battery Suppliers - JINGXIAN

Shenzhen Jingxian Battery Technology Co., Ltd: Electric battery, an electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices.