I was thinking to buy a Retroid Picket 5, but i found out that Retroid doesn't sell battery replacement, and apparently there are not third party batteries on the market. What retro handheld should I get that has reparability as a feature?

(already own a SteamDeck) Edit to add: want to emulate N64, arcade and run some game ports. Also woukd like to run Rocknix with it probably.