Micro-usb car charger doesn't charge cellphone
I have an unbranded car charger (not verizon's, but similar to this http://www.wirelessemporium.com/productp...)
If I plug it to my cigarette lighter, the LED light turn on. However, it can't charge my cellphone. I use my USB-to-MicroUSB cable and plug it to the extra USB port, and it failed too... I use the cable everyday to charge it (plug to wall charger), so I'm sure it's not the cable problem.
I used my multimeter to test the voltage across the USB cable (red and black wire), and it registered 5V. I can't get the actual amperage because my multimeter can only go up to 250mA, and when I tested it, the reading was over the scale.
Anybody know what's wrong and hw to fix it?
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9 commentaires
Do you have any other device you could try to plug into the adapter. There is a possiblity that the wiring is different, not necessarily faulty, for the charging circuit.
par oldturkey03
Yes I tried 2 different phones and 2 different cables, they both didn't work. However they *do* charge using other chargers (both wall and other car chargers)
par esso sampah
Okay, so it stands to reason that your adapter is at fault. Any chance you can open it up and see what you got inside?
par oldturkey03
Check out the documentation that came with the device if you can find it, or what the markings on it says what the the supply amperage is. It needs to be marked to be sold here in the states. If not you'll need to get a new one. Without a meter that can measure the expected amperage it makes no sense opening it up.
par Dan
How did you measure the amperage?
par oldturkey03
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