Apple can replace batteries in ~all of its devices except for the Apple Watch, usually for $50 to $80. My wife had her iPhone 6S battery replaced at an Apple Store while she waited < 30 min. Perhaps there’s a critical small size limit below which such operations are too finicky but it would be great, just as Apple’s come up with tools for in-store use, if HA manufacturers could come up with a relatively inexpensive tool to automate the replacement of HA Li-ion batteries by your HCP where all the mechanics would be taken care by operating the tool. I think with Apple, there’s the risk your iPhone or iPad might be irreversibly damaged in the process but the risk is low enough, they offer to give you an equivalent replacement device if things get screwed up. Perhaps HA OEM’s through their HCP’s could operate on the same plan?
Edit_Update: Actually, iPad battery replacement is very expensive if it’s out-of-warranty - probably better to buy a new iPad. Inexpensive if in-warranty or you’ve been buying Apple Care, which adds up in $$$. iPad battery replacement cannot be done in-store, either. Batteries - Service and Recycling - Apple And for the Apple Watch, several years ago an Apple Store support person told me that the Watch replacement service is just a new watch (still true?).
Dumb idea for changing HA rechargeable: Tool like Cerustop wax guards - pop open HA body shell. Stab out/pry out old battery, flip tool, and stab in new battery. Just as how wax guard is locked in place by inserting receiver into mold again, closing up the HA body shell would lock the battery in place within the shell - problem with this stupid scheme is battery might have a defined rigid shape, unless it were a floppy container with all the rigidity just in a connector end through which the tool does the removal of the old, the insertion of the new, like unplugging from and replugging a bag into an electrical outlet via a plug on one end of the bag. HA OEM’s have probably considered all such possibilities but maybe somewhere there’s a nasty old new Steve Jobs who screams, “Don’t tell me it can’t be done! Just go back and do it!”.