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).
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All Power Banks
In order not to get lost when it comes to the seemingly endless selection, we regularly test new power banks and select the best ones for you. In addition to the overall rating, the table shows the energy efficiency , measured capacity , charging time and voltage at the USB output .
The capacity measured by us is given in watt hours (Wh) and not in the usual milliampere hours (mAh), since the latter information always causes confusion and is ...
Pass-Through-Charging Power Banks
Wouldn't it be practical to be able to charge your smartphone or tablet at the power bank, while charging the power bank itself? A single USB charger would charge the power bank and devices at the same time then. The solution is called pass-through charging or charge-through.
However, we would like to consider that even with the appropriate equipment, the pass-through usage should be temporary and not 24/7. Even premium models are therefore not ...
Power Delivery (PD) Power Banks
Not only smartphones and tablets, but also notebooks and even small all-in-one PCs (AiO) are increasingly being supplied with energy via USB-C instead of proprietary connections. Since the original USB type A connector was initially designed for 0.5 watts, primarily supplying mice and keyboards, later increased several times up to 7.5 watts, a major innovation was needed.
This innovation actually came out in 2012, but never made it to a real-wor...
No matter whether external battery, smartphone, tablet or notebook: All devices of our everyday digital life should be recharged as quickly as possible. In the table below there are various measurement data for modern USB-C power adapters. In addition to the overall rating, the table shows the energy efficiency for various loads, the standby consumption, the maximum output power for USB-C Power Delivery and possible voltage-current-combinations ...
USB-C Power Banks (In/Out)
For over 20 years, more precisely since 1996, the Universal Serial Bus has been accompanying us in billions of everyday products, probably better known under its acronym USB. As convenient as the "square head" USB Type-A and its more compact relatives such as Micro-USB are: Technology is advancing and so in 2014 the connection that should change everything was announced to the public – USB Type-C.
USB-C not only makes it possible, ...