Portable charger: what to choose, what to look for?

Question

Batteries

Good afternoon!
I wondered about buying a portable charger.
There was an article on Habrahabr about an ordinary device, but in the comments everything was perfectly painted.
Unfortunately, this article has been moved to draft.
I would like to hear your opinion on what to look for and what to buy?

Answer 1

Separately, a box for 1-8 (depending on needs) 18650 cells and the same number of 18650 batteries themselves.
Something like this - www.fasttech.com/products/1280901
And Sanyo 2600 batteries.
This is a people-tested option. All the rest are from the evil one.
Battery test - mysku.ru/blog/others/9018.html Charging
tests - mysku.ru/catalog/5.html?sort=byRating
Read the comments as always.

Answer 2

habrahabr.ru/post/63062