Power Bank

[Slim]

Can anyone recommend a good USB power bank? I have this AA battery powered one from Amazon:

https://www.amazon.co.uk/gp/product/B074VYYTDV/

The nice thing about it is that it will take standard or rechargeable AAs which might be useful in an emergency, but it's slow and it won't charge my phone completely.

[Fishy]

BSYYO portable charger,15W... https://www.amazon.co.uk/dp/B08KXPF5NK?ref=ppx_pop_mob_ap_share

I got one of these tail end of last year.. wanted one for going out on bike as phone battery is pretty flaky.. it's pretty good charges phone pretty quickly and the power bank itself holds it charge