New answers tagged charging
Looks like your macbook air needs at least 50% battery to charge a phone while on battery and asleep.
actually you do not need amplification. Simply use an adapter like the FiiO L11 (or another cheap 30-Pin > Line-Out + USB-Power-In) an you´ll be amazed: The sound will be way louder and way, way better than the one from the headphone-out. Trust me, I made an A/B-comparison with A=adapter and B=Headphone-Out, both connected to the Line-Ins of an DJ-Mixer and ...
Try resetting the SMC (System Management Controller) — the SMC controls many hardware features of the Mac and resetting it can fix problems such as a Mac not responding to the Power button: Power The computer doesn't respond to the power button when pressed. Source: http://support.apple.com/kb/HT3964 Connect your friend's known working charger. ...
Actually it should be RT (room temperature) like all the time. Check the pins to see if one of them is getting discolored. The only reson for your converter to get hot is a bad contact creating a arc, that creates heat. Making sure the plugs sit tight (on both sides) and that none of the contact pins (on both sides) is discolored. Cleaning the pins could ...
It will destroy your battery if you do that for a long time... Mine exploded when I plugged it in after a while of using it! CAUTION!!!!
The USB on a computer is not as punchy as a 10W Power adapter (2 Amps). If you want a fast recharge, you should better use a power adapter.
Put it into the Airplane mode and switch off the screen while charging. It will charge faster.
I charge my iPad and iPhone with the same cable and notice no difference.
On Mavericks take a look in the Activity Monitor's Energy sections bottom.
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