HTL12,DL-31 Electronic Keyless Hotel Door Lock Battery Replacement Secure Lox S717 Door Lock Battery Item #: DL-31 Best Value Brand New 100% Compatibility Product Specifications for Replacement Secure Lox S717 Door Lock Battery SPECIFICATIONS: Part #:DL-31 Voltage:6 Volt Capacity:2850 mAh Type:Alkaline-Manganese Dioxide (Zn/MnO2) Length:1.9" Width:2.2" Height:1.1"