Remember batteries? They used to show up in things like pagers, digital cameras, voice recorders, flashlights and other things that smartphones replaced.  They’re still used in many toys, remote controls ...

The main problem with standard alkaline batteries is that they have to be thrown away after a few hours of use—an inconvenience for users and the environment. Typical rechargeable batteries do away with that ...

Communication, social media, games, navigation — the way we use iPhones is a lengthy one, making it the most important tool in someone’s pocket. Products that save the day come in all shapes and ...