[FRSBRZGT86FAN]

Originally Posted by ermax

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.

Also because USB C is designed is designed for more than just phones, it's a multi device thing, they max out at 4.5-5 volts and 20 amps for things like laptops or bigger tablets that allow it.
The increased power on some oem android auto head units, for instance mazdas, is so that you can keep your charge level. It's the reason why they swapped out the old USB hubs as part of android auto upgrades on the mazda connect systems.



Also not turning this into an android debate but the "monster" battery statement is invalid that's totally manufacturer related, 3700 mah on my OP6t makes it last past a whole day for me and the dash charging is crazy fast, alot of these android phones have quick charge or a rapid charge tech to compensate.