An extreme close-up of a 3V CR2032 button cell battery - VGV MEDIA/Shutterstock If you've had to replace the battery in an Apple AirTag, you've seen a CR2032 battery up close. The performance of the 3 ...
A cheap multimeter won't repair gadgets for you, but it quickly shows what's actually broken.
A failing battery might seem straight forward to spot, but a failing alternator can be a little more difficult to identify without knowing its voltage output.