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Visonic PowermaxComplete battery depleting fast in outdoor siren - !!..DIY Installers..!! - Security Installer Community
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Amazon.com: Synergy Digital Alarm System Battery, Compatible with Visonic MCS-740 Siren Alarm System, (Li-SOCl2, 3.6V, 16000mAh) Ultra High Capacity, Replacement for DSC 2XER18505M Battery : Electronics
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Amazon.com: Synergy Digital Alarm System Battery, Compatible with Visonic MCS-740 Siren Alarm System, (Li-SOCl2, 3.6V, 16000mAh) Ultra High Capacity, Replacement for DSC 2XER18505M Battery : Electronics
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