The survey of 2,000 Americans pinpointed precisely what level of remaining phone battery people reach before they start to worry or seek out a way to get charged.

In maintenance mode, also called trickle charging, the charger works to stop the connected battery from discharging ...

There are telltale signs that your car's lead acid battery might need water replenishment ... getting stranded if the darn thing runs out of charge. As car enthusiasts can attest, a dead battery ...