Hi @smidge92651
Couldn't find a teardown for your exact model, but here's a [https://www.youtube.com/watch?v=9O-cYMtFG5c|video] that may help, as it should be close enough.
The battery can be seen being removed at 5:27 minutes into the video.
Search online for [https://www.google.com/search?client=firefox-b-d&q=C21P2101|C21P2101] (examples only) to find suppliers that suit you best.
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