Hi @buy_used ,
Here’s a [https://www.youtube.com/watch?v=LAFx49ONaXU&t=1s|video] that shows how to remove the screen from a Fitbit Versa.
Here’s a [https://www.youtube.com/watch?v=vzEJzb5-czo|video] that shows how to remove the battery.
[https://www.ebay.com/itm/Original-Genuine-OEM-Fitbit-Versa-FB504-FB505-150mAh-Replacement-Battery-Parts-/323890784023|Replacement batteries - example only] are available online. Just search for ''Fitbit Versa battery part'' to get results for suppliers.