If you search for "USB battery" or "Power Bank" at large online retailers, you will quickly be overwhelmed by the hundreds and thousands of models available. The same for USB wall chargers. As a result, we cannot test all models either, but with almost 100 products, including many bestselling items, we hope to offer some guidance.
In addition to an overview of all tested USB batteries, you will also find rankings that have already been filtered. For example, only include models with a USB-C connection or the ability to charge notebooks (USB power delivery).