The DSC BATT-PGX901/X911 includes two (2) replacement batteries for the DSC PG9901 and PG9911 PowerG Wireless Sirens. These batteries have an average lifespan of eight (8) years. The sirens come with two (2) batteries, this is a replacement pack.

The DSC BATT-PGX901/X911 serves as the replacement battery for the DSC PG9901 and PG9911 PowerG Wireless Sirens. Both of these sirens already come with two batteries included. The original batteries will last between seven (7) and nine (9) years before replacement is required. Replacement of these 3.6 Volt Li-Thionyl Chloride 0-102710 batteries is simple, with a quick connect/disconnect harness and connector built into each battery.