When I plug my iPhone into the USB port sometimes a message pops up that says "The accessory uses too much power and will be turned off" Then a few seconds later my phone will stop charging, but then within a matter of seconds it will charge again and go on and off like this each time giving me the error message. 2012 C- Three
a physical connection of your audio electronics to your car's audio system (there's this little option in the car's radio connection marked "usb")
i believe the usb in the car is rated at 500ma whereas the iphone needs at least 1000ma/1amp to charge. so the lower ma rating will cause the iphone to cycle thru the charging phase.
Are you using the Apple cable or a cheap one? I have a PiP and I've charged my iPhone 5 albeit really slowly. Best thing is to use Bluetooth and use an "iPad" 2.1 amp charger on the iPhone.
I've charged an iPhone 5 and 6 with the USB port with no issues for over a year. I did see that message you're getting one time, but it went away after I unplugged the phone and plugged it back in.
Someone in a previous thread said it was due to using a non-factory cable: Entunes and iPhone 4s | PriusChat I'd never try to charge my phone with the USB data port, it was designed for the iPod. I keep a USB flash-drive plugged into that port. I use a USB adapter in the lighter socket for charging. Bluetooth works well enough for playing music from the phone.
I agree, I-phones draw more amps than allowed with a standard USB. I use a plug in charger so I can get the 1amp + that is used when driving with WAZE or GPS app. Look for a tablet which normally use 1.2 ampere for the larger screens iPhone ?
Ensure you are using the genuine Apple cable; I had the same issue/message while trying to use a cheap knockoff cable; switched to the original cable and everything is fine. As for charging, my iPhone 5 is always plugged in via the USB port and it charges just fine; phone is always charged without any issues.
The current draw on a properly working 5s is approx 0.49 Amps!! Unless there is some hig running in the No the phone only draws 1/2 amp, but that is the limit of that USB port. I have a USB cable with a Volt & Amp meter in it. Very handy!! OP you should use a different way to charge your phone!
