We rely on our smartphones so much that, if you're on the go, your phone dying can be a major concern. Portable chargers are great, but not everyone wants to buy one or carry it around everywhere, so ...

When your phone's battery gets really low, like down to 2%, what do you do? My guess is that you plug it in to charge or reach for a battery bank. If you can't recharge, you turn on your phone's ...