

1 - I don’t believe you can use Minecraft without Microsoft any more - Mojang accounts were discontinued in favour of Microsoft accounts, and unmigrated accounts were deleted in 2023.
2 - Many updates have happened, but the launcher still lets you download and play every single version released, from major (x.), minor (.xx), to snapshots and one day specials, to the very first working version. Note: the first version is also available to play online for free. The last non-Microsoft update was 1.7.2 I believe
The trick of retrofitting any battery powered device into a wired one is to remove the battery. No matter what, Li-ion batteries cannot sustain permanent power. Expensive adapters and new Androids can regulate power well, as can automations, but the best worry-free option is battery removal.
Edit: I’ve just remembered Fairphone, they’re bossing the mobile repair ability front and have removable batteries like pre-2012. Could get one of those