Leoch VRLA-AGM batteries indicate Valve Regulated Lead Acid Battery with below features; Maintenance-free, no water adding required; Sealed Valve-regulated, Spill proof and leak proof; Using unilateralism exhaust (Safe Vent Valve) design on the battery cover, when the battery internal pressure have been up to the specifically value, the safe vent valve will be opened automatically and closed after the pressure have been discharged, which can prevent the air to enter into battery.
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