GoKawiilGuide outlines methods to test CR2032 coin-cell batteries at home
A new guide explains several ways to check whether a CR2032 coin-cell battery still works, including dedicated coin-cell testers, basic multimeters, and a simple LED test where touching the LED's legs to the battery's terminals shows whether it can supply current. It also notes that AirTag and SmartTag2 users can check battery status directly through their companion apps before opening the device.
GoKawiil's interpretation of the reporting above, not reported fact.
The guide suggests that for a battery costing only a few dollars, buying specialized testing equipment may not be worthwhile, positioning simple at-home tricks like the LED test as more practical for casual troubleshooting. It also highlights safety considerations, noting that coin batteries can be dangerous if swallowed, which underscores why proper disposal and handling matter as much as testing method accuracy.
- Dedicated coin-cell testers and multimeters can test CR2032 batteries but may not be cost-effective for a single battery.
- A red or yellow LED touched to the battery's terminals can indicate if it still supplies current, though it doesn't measure remaining life.
- Apps like Find My and SmartThings let AirTag and SmartTag2 owners check battery status without manual testing, and swallowed batteries require immediate emergency care.
Energizer CR2032 Lithium Batteries — Since testing often reveals a weak or dead CR2032, it's handy to have fresh replacements ready to go. These lithium coin cells are the standard size used in AirTags, key fobs, and other small electronics mentioned in the article. A multi-pack means you won't be caught without one again.
See Energizer CR2032 Lithium Batteries on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: engadget.com — Husain Parvez, 2026-10-24
Published there as: “Here's how to test a CR2032 battery to see if it's good”
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