The Fluke multimeters listed take a 9V battery and the Klein Tools meters two AAA. Amprobe’s 30XR-A and 37XR-A take a 9V and its PM55A a CR2032 coin cell.
Who made the meter?
Which model?
The battery it takes
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Multimeter batteries by model
Multimeter batteries by maker and model
Maker
Model
Battery
Fluke
115, 117, 87V
One 9V
Klein Tools
MM325, MM400, MM420, MM450, MM720
2 AAA
Amprobe
30XR-A, 37XR-A
One 9V
Amprobe
PM55A
CR2032
From each maker’s product pages. Other models may take a different battery.
Keep coin 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 a 6LR61 the same as a 9V battery?
Yes, Energizer's 9V alkaline datasheet gives 6LR61 as one of its codes, with 522 and 1604A.
From Fluke, Klein Tools and Amprobe product pages, Energizer’s 9V datasheet and the National Capital Poison Center, read on October 25, 2026. Checked against published data from Energizer, National Capital Poison Center, Fluke, Klein Tools and Amprobe.
National Capital Poison Center, Button battery ingestion (poison.org/battery)
Fluke product pages (US): Fluke 115, 117 and 87V digital multimeters
Klein Tools product pages: MM325, MM400, MM420, MM450 and MM720 multimeters
Amprobe product pages: 30XR-A, 37XR-A and PM55A multimeters
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.