# Use a multimeter to check whether a CR2032 battery needs replacing

- URL: https://talkfuse.com/story/heres-how-to-test-a-cr2032-battery-to-see-if-its-good/
- Published: 2026-10-24T15:00:00+00:00
- Updated: 2026-10-24T15:22:31+00:00
- Original publisher: Engadget
- Original article: https://www.engadget.com/2291408/how-to-test-cr2032-battery-see-if-good/
- Topics: Gadgets, Geopolitics, Politics, Technology

## Key points

- A fresh CR2032 typically reads around 3V.
- Voltage alone does not prove the battery works under load.
- Replace damaged cells and keep them away from children.

## Summary

A multimeter can check whether a CR2032 coin cell still has voltage, which may help diagnose a sluggish key fob, tracker or sensor before blaming the device. But a voltage reading alone cannot show whether the battery can deliver enough power when the device is in use.

Inspect the battery and device contacts first, and replace the cell if it is damaged or leaking. A fresh CR2032 reads about 3V; around 2.5V suggests replacement, though persistent problems are best checked with a new battery. An LED can show that a cell supplies some current, while AirTag owners can check for a low-battery warning in Find My. Keep removed coin cells away from children and tape their terminals before recycling.

---
Summarised by TalkFuse (https://talkfuse.com/). Quote the original publisher for the reporting and link this page for the summary and discussion.