Streamlight 72030 Key-Mate Silver 1.5 Volts Alkaline 150 mAh Fits Key Chain Light/MicroStream/MacroStream (4) Single Pack

Streamlight Key-Mate LR44, 4-pack of high capacity alkaline button cell batteries allows lights such Streamlight's KeyMate to run longer and stay brighter than any button cell keychain LED light - for up to 96 hours.