AA Disposable Battery Pack, Fits Brand Saflok, Voltage - Batteries 6V DC, Capacity - Batteries 3,112 mAh, Battery Cross-Reference 884955, HTL-1, HTL-17, S54490, Fits Model IC, S54490, SL2500, System 5000, VC, Battery Chemistry Alkaline, Height 2.75 in, Width 2.06 in, Depth 0.625 in, Number of Cells - Battery 4, Max. Operating Temp. 130 Degrees F, Min. Operating Temp. -4 Degrees F, Terminal Type - Batteries Wire Leads, Standards ANSI C18.4M, ANSI Z-400.1, GHS, IEC 62474, JAMP AIS