Two types of valve regulated sealed lead-acid batteries There are two types of valve regulated sealed lead-acid batteries: one is the valve regulated sealed lead-acid battery with an ultra-fine glass fibre diaphragm (AGM) and the other is the valve regulated sealed lead-acid battery with a colloidal electrolyte (GFL) (abbreviated as GFL-valve regulated sealed lead-acid battery). They both use the cathode absorption principle to enable the...
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