I had one of these that was pretty nifty — you could pull the battery and take it with you as a power pack. Unfortunately like many cheap lithium implementations, running the battery all the way out came with a chance that it would refuse to charge again. Not ideal for a UPS…

I stream games from my PC to my Steam Deck, so I still use both. Streaming is a lot easier on the Deck’s battery, so it also makes it easier to play high performance games at high settings for longer while portable!