

Where have Steam said they are partnering with a company to offer replacement parts? As far as I’ve read, Valve have not provided any details around sourcing replacement batteries for the Steam Controller. All they’ve said is that the controller is able to be serviced by opening via the screws and clips - ie it’s not glued closed like many user-hostile companies, eg Google Stadia.
This is in no way the same as old smart phones (eg Galaxy S1-S5) toolless battery replacement, where you would just slide off the battery cover, pop out the old battery insert new, click battery cover back on. PS3 Dualschock 3 controllers are also exactly as user-serviceable - clips and screws, no glue. So I agree with OP: batteries that are built for toolless user replacement to a standard format are far superior. This is just asking for e-waste.

I’m hopeful this leads to being able to play older Android games.
One of the things that sucks about Android is that as the versions march on they raise the API requirements (ostensibly for security), which leaves old games being unable to run on new devices.
I have a bunch of games purchased om Humble Bundles over the years that now just refuse to run on my Android devices as their API target level is too old.