Quote:
Originally Posted by odamizu
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Playing around with AC will make your head spin.
Back to chargers, there is another issue to consider. With most tablets and phones the "data" lines (USB2 uses 2 wires for power and 2 wires + the power ground wire for data) are often used to signal the device that a charger is present. There is a USB standard for this, but many devices use their own proprietary system. This can result in a charger with perfectly appropriate voltage and current specs to fail to charge a particular device. Again, the easy, simple solution is to stick with the manufacturer's original charger.
At my house, my wife and I have a wide variety of chargers. Our phones, Bluetooth speakers, Bluetooth headsets, ... all charge fine on all chargers. My phone complains about some of the chargers, but works fine anyway. The one outlier is my Dell Venue 8 pro. It won't charge from one of our universal AC power strips with USB outlets (works with the other one from a different brand) and only works with one of the two outlets on a GE brand dual charger. The Dell doesn't seem to "get the message" from the two chargers that fail.