(2-PACK) 2.4V 1000mAh Gas Meter Highest Capacity Battery for TIF 8800 Combustible Gas Detector TIF: 8800A 8806A 8850 NP-5459 NP5459 Interstate : ANIC0286 Saft: 405421 Voltage: 2.4, Amperage: 1000mAh, Chemistry: NiCD NEW Button Top Assembly Cells