Visonic PowerMax Lithium Sounder Battery for MCS-710, MCS-720 and MCS-730 (0-9912-K)
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
Visonic PowerMax10 User guide | Manualzz
How to change battery in Visonic wireless PIR - YouTube
Alarm System Battery Replacement for Visonic 0-9912-L, GP220AAH8YMX - 2000mAh, 9.6V, NiMH - Electropapa