Button Battery Identification


Proper identification becomes important when replacing the button battery in a watch, remote control, computer, calculator, electronic organizer or other device. It's also helpful to determine which button battery types are equivalent.

Battery Type

  • Examine the flat side of the button battery, using a magnifier if necessary. Look for a model number like "CR2016," "V76PX," "SR41" or "AG5." The brand name, voltage and other markings don't hold as much importance for identification.


  • Often a specific type of button battery will become hard to find, expensive or discontinued. A battery cross-reference chart helps with the identification of equivalent batteries (see Resources). For example, charts show that an "LR44" is the same as an "AG13."


  • If you can't determine the type of button battery, take it to a store that sells watches, cameras or electronics. Bring the device it powers as well. A store employee can help you with identification and replacement of the battery.

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