PCWorld explains how to calibrate smartphone and laptop batteries when they display inaccurate percentage readings or cause unexpected shutdowns. Battery calibration involves fully charging to 100%, ...

Well, this is all getting excitingly real. Last month, we brought you news of Donut Labs’ production-ready solid-state battery that it claimed could be recharged from flat to full in five minutes. Now ...

You unplug your laptop at 100%, and within the first twenty minutes, it's already at 85%. Then, strangely, it seems to crawl from 60% down to 30% over the next two hours without much drama. Does it ...