A faulty lithium-ion battery is a serious hazard and can catch fire. Here's what to do if the unthinkable happens - and some tips for preventive care.

We've told readers to use zipper or slider food bags to protect devices. But you can also buy special bags that makers claim offer maximum protection, some with features that include headphone jacks.

You can still make and receive audio and video calls without a cellular connection. Here's how to do it on your Android or iPhone.