Technology · 57 views
Here's how to test a CR2032 battery to see if it's good
Your car key fob suddenly needs several presses to unlock the door. Your AirTag stops responding when you try to locate it.
AI Summary
When a car key fob or an AirTag stops responding, the first step is to check the CR2032 battery inside. The CR2032 is a 3‑volt lithium coin cell used in devices such as Samsung SmartTag2 and some smart‑home sensors. Depending on usage, the battery can last more than a year. A multimeter can measure its voltage, but a voltage reading alone does not fully indicate battery health. If you don’t already have one, a multimeter is a useful addition to your toolbox.
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