As the number of mobile phone features grows, their batteries may drain faster than in the past. If you are on the road for a trip, whether business or pleasure, you need to keep your phone charged in case of an emergency. Therefore, a phone car charger is an essential safety component before hitting the highway. There are many types of car chargers, though, and you want to find the best match that is safe for both your phone and your vehicle. Here are three tips for using a cell phone car charger that will keep your mobile life powered up.