With the increasing use of smart phones there is a growing market for USB power banks. While there are some quality products from reputable manufacturers out there, there are some that aren’t so good. I’m going to be testing as many as I can so that you can buy with confidence.

I promise that the reviews will be independent and impartial, focussing on the technical claims of the manufacturers and other testable features. I will not accept free products in order to ensure that there can be no claims of bias.

I will share the testing methodology in detail so that anybody can reproduce the results, and will be explaining how it all works.