The calipers listed each run on one button or coin battery: an SR44 in the Mitutoyo, an LR44 in the Neiko models and a CR2032 in the Starrett.
Who made the caliper?
The battery it takes
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Caliper batteries by model
Digital caliper batteries by maker and model
Caliper
Battery
Mitutoyo 500-196-30
SR44
Neiko 01417A, 01409A
LR44
Starrett 798B
CR2032
From each maker’s product page. Other models may take a different battery.
SR44 or LR44
An SR44 and an LR44 are the same size, 11.6 x 5.4 mm by Energizer’s datasheets. The SR44 is silver oxide at 1.55 V, and the LR44 alkaline at 1.5 V, so fit the one the caliper’s maker names.
iGaging, General Tools and other brands
For other calipers, read the code printed on the old battery or look in the manual.
Keep button batteries away from children
The National Capital Poison Center says that if anyone swallows a battery, immediately call the 24-hour National Battery Ingestion Hotline at 1-800-498-8666 or your poison center at 1-800-222-1222. Don’t delay. Immediate treatment decreases severity.
Common questions
Is an SR44 the same battery as a 357?
Yes, Energizer's datasheet for its 357 silver oxide cell also names it SR44.
From Mitutoyo, Neiko and Starrett product pages, Energizer’s datasheets and the National Capital Poison Center, read on October 25, 2026. Checked against published data from Energizer, National Capital Poison Center, Mitutoyo, Neiko and Starrett.
Battery sizes come from battery makers' datasheets and device makers' own manuals and help pages. Check your device's manual or the old battery before you buy. If anyone may have swallowed a battery, call the National Battery Ingestion Hotline at 1-800-498-8666 or your poison center at 1-800-222-1222 straight away.