Door Lock Battery Pack Fits Brand Saflok Voltage - Batteries 6V DC Capacity - Batteries 2 900 mAh Battery Cross-Reference 884955 HTL-1 HTL-17 S54490 Fits Model IC S54490 SL2500 System 5000 VC Battery Chemistry Alkaline Height 2 in Width 2.5 in Depth 0.5 in Number of Cells - Battery 4 Max Operating Temp 130 Degrees F Min Operating Temp 0 Degrees F Terminal Type - Batteries Wire Leads Standards ANSI CE ISO9001 RoHS