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iPad 2 not charging through USB

D

Dr. McKay

macrumors 6502a
Original poster
Jan 20, 2010
821
112
Belgium, Europe
I activated my refurb iPad 2 yesterday. When I connect it to iTunes via USB however, it says 'not charging', even though it's connected to a USB 2-hub with its own power supply.
Is this normal ? Does this mean you can only connect it directly to a USB-port on the mac ?
 
Last edited:
Dr. McKay said:
I activated my refurb iPad 2 yesterday. When I connect it to iTunes via USB however, it says 'not charging', even thought it's connected to a USB 2-hub with its own power supply.
Is this normal ? Does this mean you can only connect it directly to a USB-port on the mac ?
Click to expand...

Yes it's normal.

I had an ASUS app that runs in my taskbar that turned on USB charging on my Windows PC (even though I didn't have an ASUS board).

I'll see if I can find the download link for you.

[Edit] - Found it: http://event.asus.com/mb/2010/ai_charger/

Just install that, reboot and charge away.
 
Most PC USB ports don't pump out enough juice to charge the iPad. Recent Macs do though.
 
They often still charge even if "Not Charging" shows up, just more slowly. I can still fully charge my iPad 2 overnight off of the USB port on my 5 year old laptop.
 
Dr. McKay said:
Haven't tried it yet. I'm at work now, I'll try tonight... :D
Click to expand...

It's likely the hub only puts out 500mA max. I believe an iPad will charge from this if its asleep, but very slowly since it's 2.5 Watts at best.

Many computer USB ports can switch to a 1A output, especially Macs, which matches the 5W capacity of an iPhone charger. Still going to be slower than the iPad's 10 Watt charger.

https://discussions.apple.com/thread/2543338?start=0&tstart=0
http://en.wikipedia.org/wiki/Universal_Serial_Bus#Charging_ports_and_accessory_charging_adapters
 
Dr. McKay said:
I have an early 2008 24" iMac (2.8Ghz C2D). However, I connected the iPad to a powered hub, which I believed would provide enough power...
Click to expand...

"Powered" can mean a variety of things, it still needs to pump out enough juice to charge the iPad. The standard charger is 2A/10W, so unless your hub puts out at least that much (and you don't have other devices plugged in to reduce the draw) you'll be charging slower than expected.
 
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