perhaps you should ask for McD’'s 1990s special szechuan sauce not space raiders for the domain :)?
I feel like I already wrote a comment about keyboards on a previous show here. Or maybe it was the amazon review for mine. I looked at reviews for lots of them and decided I didn’t want one with mouse track pad (if I need a mouse badly enough I bring a baby one and plug it in via USB OTG cable bit that is rare indeed).
I wanted one that will take abuse abused fit in a pocket and in a train back-of-seat tray. Batteries even for BTkeyboards last ages - a month or more for most I think, so shouldn’t need to be a consideration. All the BT ones only do BT it seems - they likely use USB to charge but can’t connect data to a device (if you are worried about anyone hacking the connection at say a security conference).
For media PC I have a Logitech (with touchpad) excellent-for-the-job almost-full-size K400 (bro-in-law independently made same choice), but for fitting in jeans back pocket or jacket inside pocket the aluminum-cased 1byone is good. https://www.amazon.co.uk/gp/product/B00VRCKF5K/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Note: that exact item not on sale anymore bit about 10 other rebranded copies by other Chinese brands (exact same item I bet) exist.
Worst downsides of this one after owning 2 years (if you don’t want touchpad) are lack of right hand shift key and USA only layout (that’s impossible to find at pocket size for under 40 quid I think) - I made little stickers (as I comment in my reviews) to remind me which shift/key combos do what UK layout keys. Plus that it doesn’t quite work ideally on a lap if your legs are not square in cross section and have a gap between, you know, like most people… the 3 way fold protects keys really well but means if you press keys in the middle too hard the middle drops down and the two sides lift up when there is nothing below the middle of the keyboard, as it starts to close up a bit. But I think I scored well with that keyboard ovreally for the money (£25ish?). A colleague at a job early this year bought about every portable small chiclet/similar keyboard amazon sell including the thinner Microsoft ones and could offer advice -he sent most back as they didn’t fulfill the needs. He was after slightly different things than me. They do an MS Natural type folding one that need a flat surface, no laps please, mine at least copes with laps if careful. Many others don’t fold small enough.
Keys on mine are so much better and more proper than a 48k Speccy, while not the same travel as a full sized board they do move and have decent feel.