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
Motherfucker I’d better get started archiving