Quote:
Originally Posted by FRSBRZGT86FAN
@ ermax
The USB port definitely doesn't output the proper power ratings for a lot of newer modern android devices. I think USB A to C limits things to 1.5 amps in a legacy environment like our stock older cars. |
The USB standard is actually 500ma. The manual for my head unit says it puts out 1a which is enough to slowly charge my iPhone 7 while running Waze (with screen on) and Apple Music. I also own a Suburban which runs the standard 500ma and it drops in charge while running Waze and Apple Music. With no apps running it will charge but slowly.
Androids typically have monster batteries to make it through a day so I wouldn't be surprised if they run higher wattage.
The headunit in my car is this one:
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Okay so before I posted this I did some reading on how Androids work. Looks like you have to short the data pins to force it to look like a dumb charger or else it will be limited to 500ma. Obviously to short the data pins you would have to disconnect those lines from the HU so you would lose your connection for playing music and it would become a charging port only. So it looks like Android is limited to 500ma on our head unit which explains why it can't keep up with Waze while the screen is on. I suspect 1A would be fine for an Android if you were actually using it. I also saw some info on rooting the phone so you can force fast charging may work.