Here is what the page “How to Test a CR2032 Battery: Simple Methods to Check If It's Still Good” contains. CR2032 coin cell batteries power countless small electronics, from car key fobs and remote controls to computer motherboards and medical devices. Knowing how to test one can save you from needless replacements or unexpected device failures. A basic multimeter set to DC voltage is the most accurate way: a fresh CR2032 should read around 3.3 volts, while anything below 2.8 volts is considered depleted.
For a quick check without tools, you can use the drop test—drop the battery from a few inches onto a hard surface; a fresh battery makes a dull thud, while a dead one bounces higher with a sharper sound. Some devices, like certain key fobs, have built-in battery indicators, but these are not always reliable. For the complete material, the listing points back to the source inside the network.