Podcasts, music, navigation — say, Waze or Google Maps — have become pretty much vital for any commute or road trip. The problem is, unless your car has a built-in screen that’s able to run CarPlay or Android Auto, you’re running your phone screen non-stop and probably at high brightness. Even if your car has a USB port to charge it, it might not be enough for today’s big-screen smartphones without running down the phone’s battery.
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