>>35981979This is the power bank I use.
https://www.amazon.co.uk/Anker-PowerCore-20100-Capacity-Technology-Black/dp/B00VJSGT2A?th=1It's a big hefty thing but I put it in my backpack's front pocket and feed the USB cable through the headphone hole thing, works well.
There are more expensive versions of this that feature power delivery charging, if your phone supports it.
Also if you ever find your power bank no longer charges your phone properly, replace the cable. They can wear down and stop delivering a proper charge.
Oh yeah and Anker have officially licensed Pokémon Go power banks in Japan as I recall, but that just means it's the same product with a decal or something.
