(Results vary by device). 9V alkaline battery. also known as MN1604, R22 etc. Battery type: Single Use Alkaline. 2x 9 Volt Batteries.
9V DURACELL PLUS POWER SMOKE ALARM BATTERY PP3 LR22 MN1604 LONG LASTING
4x 9v Duracell Plus Alkaline Batteries 100% Life Guaranteed 9 Volt
3x 9v Duracell Plus Alkaline Batteries 9 Volt Block Battery x 3
2x Duracell 9V PP3 Plus Power Long Lasting 9V Battery Smoke Alarm LR22 MN1604
2x Duracell Plus 9V Alkaline Batteries 6LR61 MN1604 Block For Smoke Alarm Remote
GENUINE 2X DURACELL 9V PP3 PLUS POWER BATTERIES SMOKE ALARMS LR22, MN1604, 6LR61