This human powered cell phone charger is a great example ... the generated energy can be transferred through the battery terminals to a connected device. So, he cut a USB charger cable in ...

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 ...

[Barry] sent us a tip about a video from [electronupdate], describing an experimental cell phone charger. It’s a familiar issue: Your cell phone battery ... capacitors to power a typical usb ...