owenmorris
iPF Noob
Hi guy's once again, the problem I have is that when I plug USB lead in my ipad2 says not charging. I always do a quick search before posting but found nothing.
Owen
Owen
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DontUnderstandMyIpad said:Have you connected the USB cable to a pc/laptop?
The iPad draws a current of 10A and only the iPad wall charger supplies this current. A pc USB supplies a much lower current and will thus only trickle-charge the iPad.
Sorry guys, im missunderstanding something i think. So what's the normal optimal way to charge the ipad 2 then?
Double check your USB specs... it is my understanding USB 2.0 is limited to 500 milliamps (0.5 amps). USB 3.0 is 900 milliamps (0.9 amps).DontUnderstandMyIpad said:Have you connected the USB cable to a pc/laptop?
The iPad draws a current of 10A and only the iPad wall charger supplies this current. A pc USB supplies a much lower current and will thus only trickle-charge the iPad.
I hope it's not drawing 10A.... . The battery would last only a few seconds if that.
For the OP,
USB only puts out around 5 watts and 1amp. That is why the iPad charges much slower connected to a PC/laptop vise the supplied 10 watt 2 amp power block.
Double check your USB specs... it is my understanding USB 2.0 is limited to 500 milliamps (0.5 amps). USB 3.0 is 900 milliamps (0.9 amps).DontUnderstandMyIpad said:Have you connected the USB cable to a pc/laptop?
The iPad draws a current of 10A and only the iPad wall charger supplies this current. A pc USB supplies a much lower current and will thus only trickle-charge the iPad.
I hope it's not drawing 10A.... . The battery would last only a few seconds if that.
For the OP,
USB only puts out around 5 watts and 1amp. That is why the iPad charges much slower connected to a PC/laptop vise the supplied 10 watt 2 amp power block.
madhatter61 said:Double check your USB specs... it is my understanding USB 2.0 is limited to 500 milliamps (0.5 amps). USB 3.0 is 900 milliamps (0.9 amps).
Some USB ports put out a different amount of current (mA)
The USB ports on my desktop monitor put out very little power. Most USB hubs have a power supply with them and they put out more power, but I don't know if enough to make the iPad show that it is actually charging. I have a USB hub so I will try it later and let you know.