Battery Pack Product Type Battery Pack Features Nickel Metal Hydride Battery Series Personal Multi Gas Detector Sub-Brand P400 For Use With Mfr No 923-GRNGR-40 Mfr No 923-GRNGR-53 Mfr No 925-GRNGR-40 Mfr No 925-GRNGR-53 Mfr No P400 Output Voltage 4.8V DC Battery Life 15 hr