Synergy Digital Alarm System Battery, Works with Visonic GP230AAH4YMX Alarm System, (Ni-MH, 4.8V, 2000mAh) Ultra High Capacity, Compatible with Visonic 99-301712, GP130AAM4YMX, GP230AAH4YMX Battery - Walmart.com
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Alarm System Battery Replacement for Visonic 0-9912-L, GP220AAH8YMX - 2000mAh, 9.6V, NiMH - Electropapa
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Alarm System Battery Replacement for Visonic 103-303707, 99-301712 - 2000mAh, 4.8V, NiMH - Electropapa