Quick view Robinair - TIF Instruments 405421 Gas Detector Battery Robinair - TIF Instruments 405421 Gas Detector Battery Voltage: 2.4 Volts Capacity: 800mAh Chemistry: NiCd - Nickel Cadmium Dimensions: N/A Terminals: Pressure / Button Top Replacement... MSRP: Was: Now: $14.95 Add to Cart