Axiom (TM 120mAh Battery Replacement fits SportDOG SDT00-11907 MH120AAAL4GC (DC-17) 120 mAh Battery Replacement compatible with SportDOG SD-400 / SD-800 Battery Capacity: 120 mAh Output Voltage: 4.8V Battery Type: Ni-MH Compatible with: SportDOG 400 & 800 Series Receiver SDT00-11907 MH120AAAL4GC (DC-17)