Your power banks's capacity won’t neatly map onto your charging needs, but finding the right size doesn’t have to be ...

Between the invention of the self starter and the end of the 20th Century, the best portable car jump starters weren’t something you carried with you. They were heavy lead-acid automotive batteries ...

You’ve likely heard advice on how to charge your phone to extend the battery’s lifespan. Perhaps you were told to begin charging it once the battery is nearly dead, to stop charging once the battery ...

You can jump-start a dead car battery by using jumper cables to connect its terminals to the terminals of a functioning car ...

Apple's battery guide describes lithium-ion batteries as "consumable components" that naturally lose capacity over time. To ...