Most car USB ports were built to sync an iPod, not charge a phone
I stopped losing battery on long drives after one $20 charger swap
My older car's USB port was designed to sync an iPod, not charge my modern phone. When I plugged my phone into the port while using navigation, music streaming, or taking calls, I often found my phone's battery draining instead of charging. This issue becomes more pronounced during long drives when my phone is used extensively for navigation.
While the car's USB port connects my phone to the infotainment system, it doesn't deliver enough power. The USB port was engineered to supply 5 watts of power at 5V, adequate for charging iPods—the primary method of music consumption when I purchased my car—but insufficient for today's smartphones, which can charge at up to 80W.
Recognizing the reason behind the port's limited power output helps me avoid slow charging. I have thus switched to a 12V car adapter to charge my phone, which effectively resolves the issue.
Written by urgent.news from XDA Developers's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
