I have the Iphone 5S, and when I try to charge it in my car charger, vis USB port, it discharges and loses power instead. Anyone hear of this before.
Some USB ports in cars are meant to be an input for a flash drive for the audio system. They are not able to supply a useful current.
Other USB ports are meant to supply power to electronic devices. Read the car owner's manual to find out which is which.
It could also be that the fuse supplying the USB port has blown or there is a hardware problem.
Sounds like either the fuse that powers the adapter is blown or it isn't properly connected in the vehicle or in the phone. If you have your phone turned on and the power cables sending power to the device from the adapter then the phone can only charge. If the phone is discharging then it means it not getting power from the adapter/USB.
Since your other post indicates a similar problem with your GPS then I think if you fix one issue both will be fixed. Make sure the cables are properly seated in the adapter/USB port (I find they may look OK but aren't fully in place) .
With my car, I have to cycle through the radio modes (USB, radio, CD, etc.) to turn on the USB port.
I have two 12 volt (cigarette lighter type)outlets in my car within arms reach. Neither of them is powered unless the ignition is on.
I have no problem charging my iPhone using a 12 volt 1,000 ma plug with a USB charging port using a USB to iPhone cord.
Mine doesn't charge either. My car USB port doesn't have enough power to charge a smartphone. It's designed for data connection only. The best thing to do is to ask your car manufacturer.
Check the fuse for the lighter plug.
Also, make sure the usb port on your car charger is rated for at least 1.0 mA output. Anything less will probably not charge the phone.
You mean 1 A, right?
I think the points about the car USB not providing power might be right. We use one of these in both our vehicles:
I'm not endorsing this in any particular way although both of mine have worked well and lasted. However, there are many alternatives that I assume work well too. There are others that use the 12V access to provide power to a USB cord.
Yes, amps, not milliamps. Thanks.
You mean 1 A, right?
I prefer using Cigarette Plug with Adapter designed for my phone, make sure it is within required amps range, it could explode battery.
If you are using Google Maps or Waze in the car, the phone uses a lot of power. We have used a couple of different chargers on several phones in the car. With an Anker unit, the phone charges very slowly. Everything else discharges, some faster than others. The second best can almost keep up; the car port is the worst. Certainly looks like the power used exceeds the power available from the charger.
Sometimes the phone won't charge unless I unplug the USB jack from the car USB and reinsert it. Unplugging/re-plugging the jack on the phone-side makes has no effect.
This has happened to me a few times in rental cars when I plug into the USB port.
Yep, time to dig the Owner's Manual out of the console or glove box to see the limits of the USB ports!
You never know what you'll find in the manual. I was curious about my GMC's towing capacity. I thought it was around 7,000 lbs. Nope! It was 10,800 lbs. according to the chart. That's Max or just about. Had to know the engine size, transmission type and rear axle ratio to figure it out. Glad I still had the Factory sticker listing all options. I always save it - Just in case.
I bought a cheap aftermarket USB cable for my iPhone 5S last year which would not charge the phone. It passes data but not power. I had to buy an Apple approved cable at 3 times the price.
Also, the USB port in my pickup will provide enough power when running some apps but not all. Navigation apps requiring GPS use seem to be the biggest power hogs. The phone will charge while I listen to music but it slowly discharges when I boot Waze. To do both at the same time, I had to get an Apple lightning splitter adapter to power the phone from another source.
My USB does not charge my iPhone either. I have to use my 12v plug.
I had the same problem with an aftermarket cable. Believe it or not all I had to do was turn the plug over and it worked. Did not think it had a top or bottom but it did solve my problem. Make sure your cable is Apple Certified also as mentioned above.
USB 1.0 and 2.0 ports, such as those found on electronic equipment and computers are only capable of supplying 500mA or 1/2A (it's a spec that applies for automotive ports too). This is usually not enough to charge a phone while also using it.
USB 3.0 ports can provide up to 900mA but are usually not found on anything other than the newest computers, they have a blue connector.
Wall chargers generally supply between 1A - 2A (some are even higher) to charge phones much quicker. There are some car cigarette lighter adapters available that can supply a similar amount of power to charge phones about as quick as a wall charger.
Lastly, not all charging cables are created equal. Usually the cheaper cables use a thinner wire gauge than the better cables. This will limit the amount of current that can be carried over the cable (due to higher resistance) even if your power adapter can supply it. Basically you want the thickest, shortest cables (lowest wire gauge number and length) you can live with for fastest charge rates. Just be aware that often the thicker cables are quite stiff making them inconvenient. You can buy one of these gadgets below to see what is going on. I had similar problems with my Android phone and wanted to know why. It's quite interesting to see the charging rate difference between cables, which is what my problem turned out to be.
For those that can't find theirs, Googling the VIN number will bring up sites that give much of the detail/options of a vehicle.
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