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sharpsicle · 05-04-2021, 03:37 PM

I can't believe people still think OEM USB ports are designed for charging. They aren't. They supply power to the device in order to operate it, they do not supply high-amperage charging power. You will get at best a trickle-charge in an OEM configuration. Aftermarket head units may supply more amperage, but often times do not. Typical data USB ports supply 500mA. Your wall charger supplies 2A+. It will of course seem like it's charging slower. This is a function of the head unit, not the USB port. The port is fine.

There are a lot of things that come into play with aftermarket head units and AA/CP. Consider that many head units only have one port on them that allows one or the other to work. Pioneers, for example, have many models where only USB1 can do CP and only USB2 can do AA. You need to configure your install properly to use the port(s) as desired. When you have these restrictions, you must choose only one port to plug in to. This is in no way reflective of the working or quality of the OEM USB port. As discussed and tested in many other threads, you can 100% use the factory USB port for these functions on aftermarket head units. Again, the port is fine. The configuration is the key.

05-04-2021, 03:37 PM	#104
sharpsicle Certs You Dont Care About Join Date: Mar 2017 Drives: 2013 Galaxy Blue BRZ Location: Milwaukee, WI / Tampa, FL Posts: 230 Thanks: 34 Thanked 131 Times in 80 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I can't believe people still think OEM USB ports are designed for charging. They aren't. They supply power to the device in order to operate it, they do not supply high-amperage charging power. You will get at best a trickle-charge in an OEM configuration. Aftermarket head units may supply more amperage, but often times do not. Typical data USB ports supply 500mA. Your wall charger supplies 2A+. It will of course seem like it's charging slower. This is a function of the head unit, not the USB port. The port is fine. There are a lot of things that come into play with aftermarket head units and AA/CP. Consider that many head units only have one port on them that allows one or the other to work. Pioneers, for example, have many models where only USB1 can do CP and only USB2 can do AA. You need to configure your install properly to use the port(s) as desired. When you have these restrictions, you must choose only one port to plug in to. This is in no way reflective of the working or quality of the OEM USB port. As discussed and tested in many other threads, you can 100% use the factory USB port for these functions on aftermarket head units. Again, the port is fine. The configuration is the key.