Is your phone, tablet, or laptop typically in the battery red zone before the day's end? These portable chargers and power banks give you the most boost when you're out of juice. I’m a Mobile ...

What we're looking for whenever we review these models is a high battery capacity and output, lots of ports and adapters for charging and powering devices and appliances, and a portable design.

Power output determines the overall power of your portable battery pack. In other words, the stronger the power output, the faster your devices will charge. We recommend looking for power banks ...

but one thing that’s certain about choosing a portable charger is that you want to know where it comes from, so you don’t fry your phone. You can find tons of battery packs from unknown brands ...