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What battery does it take?

Pick a device to see the battery it most often uses, the alternatives some models use, and how to check yours.

DeviceMost common batteryAlso used
Smoke Detector9VAA
Carbon Monoxide DetectorAA9V
Apple AirTagCR2032–
Garage Door Opener RemoteCR2032CR2016, A23
Roku RemoteAAAAA
Xbox ControllerAA–
Xfinity RemoteAAAAA
Computer Motherboard (CMOS)CR2032CR2025
Digital Bathroom ScaleCR2032AAA, CR2450
Digital ThermometerLR41AAA, CR2032
WatchSR626SWSR621SW, SR920SW, CR2032, CR2025, CR2016
CalculatorLR44CR2032, CR2025, AAA
Laser PointerLR44AAA, CR1220
Car Alarm RemoteA23A27, CR2032
Wireless Doorbell ButtonA23CR2032, CR2450
Hearing AidSize 312Size 13, Size 10, Size 675
Blood Glucose MeterCR2032AAA
Car Key FobCR2032CR2025, CR2450, CR1632, CR2016