> For the complete documentation index, see [llms.txt](https://key.hideez.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://key.hideez.com/troubleshooting/how-to-change-the-battery-untitled.md).

# How to change the battery?

How to change the key's battery

To replace the battery - open the case, prying the gap between the halves with a fingernail or a plastic card (do not use metal objects). Remove the old battery by pushing it from the inside with a narrow plastic object. Install the new CR-2032 battery with the narrow side (negative contact) to the board. Hideez Key-2 will beep and then ready to go.

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All user data is stored in non-volatile memory, when power is turned off (removing the battery), it is stored.