contemplating between a few powerbanks,

xiaomi 10400 - cheap and not bulky despite the capacity, but not sure on reliability as quite new to the market?

Enerpad 9000mAh - almost double of xiaomi yet lower capacity, but a very reputable brand in the battery market, plus its pretty small and not bulky

Yoobao 6016 - high capacity but looks a little bulkier than the other 2 options.

can anyone advice?