We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Sarah Witman Sarah Witman is a writer focused on batteries and charging ...

The HyperJuice 245W USB-C Battery Pack is the heaviest model we tested, as well as one of the most expensive. In our output tests, it was not as powerful as advertised, and in look and feel it’s ...

[Paul] recently purchased an inexpensive USB power pack ... to see just how much current is required to keep the battery pack on, and for how long. Testing a few resistors he discovered that ...

“No problem!” you exclaim. “I’ll just use a USB battery pack!” But the current draw is too low, and the pack won’t stay on. “Blast!” you exclaim, because you’ve been watching too ...

Start Dead Batteries - Safely jump start a dead battery in seconds with this compact ... UltraSafe - Safe and easy-to-use car jumper starter and jump pack without worrying about incorrect ...

But that also explains why this battery pack is cheaper, so do keep that in mind. It does also include a USB-C cable and this battery is able to do 20W PD charging. ESR has some really nice iPhone ...