According to SheFinds.com, using a car phone charger should be your last desperate measure for a low iPhone battery.

Here's why:

  • In most cases, your phone needs more electricity than the charger can provide so it isn't efficient.
  • If you are using the cigarette lighter to plug in, you could be getting too much power. The sudden spikes and surges of power from the device could cause damage to your phone by causing it to overheat.
  • If you have an older car or a struggling car battery, you could end up on the side of the road because your car charger has drained your car battery.

I have no sense of direction, so the G.P.S. gets me to where I need to go. I have noticed my phone getting hella-hot in the charger and now I know why!