Looking at the charging preferences of the Steam Deck, which from my research wants 45W at 15v/3A, it looks like the larger model should work just fine. And with it being $15 USD / $18 CAD this could be an incredible bargain.
It’s so new though I can’t find any info on it being used with a Steam Deck. I’ll definitely be grabbing one to try, as it would be perfect for my USB hub that sits by the TV.
I got a pair of these little Scosche cubes for under $30 at Costco. They’re about 3cm³, non-folding. It’s pretty amazing to have 30w in about the same package as an Apple 5w phone charger.
Other than this, my favourite charger to tuck in the deck case is a folding, flat against the wall 45w puck that is thoroughly discontinued.