Its not to bad at all when you do the maths. Lets say 20000mah divided by 6. Now compare it to the cell on lets say your phone and how long that takes to charge from empty.

You could make this charge faster but the trade off would be a bigger unit with lower mah cells that accept faster charge but even then, these dont fare well long term. Its a bit a trade off and compromise. This is a nice find btw.

It will, but the charge you get with usb A to usb C is very slow, you'd be better off buying the ravpower with usb c and a usb c to usb c wire.

It's as much in the cable as it is in the power bank. I have this exact power bank and played Zelda on my Switch for 8 hours solid on a flight from London to Orlando using the charging cable that comes with the pro controller.

I also have an old Foxnovo power bank that works just as well with the same cable but it isn't as high capacity.

I've read so many reports online saying that you need to spend a lot of money on a power bank to play and charge the Switch and that very few work, but if you use a good cable I think more will prove to work fine.

So, get this power bank and use a pro controller cable and you're good to go

= cynical person