I also have a few Anker ones, they get a lot of use in the campervan. Even though I have USB outlets in there I don’t trust them for sensitive equipment. The largest one in the pic is 24000 mAh and will charge a laptop and does my 12.9 iPad with some to spare. There’s an Amazon shop that often has them on sale
The flat one is a PD and fast charges the phone really quickly when needed, also has a trickle mode for delicate things like the earpods in the case there.
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I have the flat one on the left and the middle one, good powerbanks. The bigger one I also have the charging base for, maintains it charged and is also a higher-powered charger for other stuff.
The smaller one is conveniently the same form-factor as a phone, I have a couple of Maxpedition zipped phone cases (bought when much reduced) and I can have the phone in one, and the power bank in the other. Great for taking when out for the day.
GC