[exporectomy]

What do you mean by non-removable battery? The video shows how to unplug it. I'm sure it can be replaced by any normal repairman or hobbyist. Aftermarket batteries will also surely be available like they are for other popular devices.

[freemint]

If it is not intended to be removed (because the SteamDeck should remain closed) it is non (user-)removable in my opinion.

[exporectomy]

So your concern is that Valve recommends you don't do it yourself and is nothing to do with the product itself?