(Results vary by device). 9V alkaline battery. also known as MN1604, R22 etc. Battery type: Single Use Alkaline. 3x 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
2x 9v Duracell Plus Alkaline Batteries 9 Volt Block Batteries x2
Duracell Plus 9v Batteries 100% Plus Power Alkaline (1 Pack) Smoke Alarm MN1604
Duracell Plus 9v Batteries 100% Plus Power Alkaline Smoke Alarm MN1604 6LR61
2x Duracell 9V PP3 Plus Power Long Lasting 9V Battery Smoke Alarm LR22 MN1604