Basement Watchdog AGM Battery, Specifications: 12 VDC Voltage Rating, 75 A Current Rating, Thermoplastic, Dimensions: 9 in H x 10-1/4 in W x 6-1/2 in D, Suitable for: BWD-120C Big Dog Connect, BWSP Special+ Connect, BWE Emergency Backup, BW4000 Big Combo, DFK961 Combo