Purchased "high power" USB hub, still doesn't charge.

I found a 4-port USB hub with two "high power" ports (Targus ACH80US), but my iPad still won't charge when attached (yes, to the high power port, yes it's plugged into the wall too).
Anyone have any ideas? I'm using an older G5 iMac, but it's going through the new "high power" USB hub.

Copied from this link.
http://www.apple.com/batteries/ipad.html
The quickest way to charge your iPad is with the included 10W USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter. *When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge, but only when it's in sleep mode.* Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.
Does your iPad not charge when the iPad is in sleep mode?

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Does anyone have this USB charger that could speak to its ability to charge iPad?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182176&cm_re=rosewill_u sb_hub-_-17-182-176-_-Product
I know that iPad needs 2A of power to charge while in use and it seems like this hub may fulfill that requirement.

It says that it comes with a 2 amp power adapter. But it is a seven port hub, and designed in the expectation that the 2 amps is going to drive all seven ports. You won't get all the power directed through a single port. It is a hub, not a charger.
If you really just want a charger for the ipad, there are plenty of choices on Amazon or Ebay, apart from Apple's own, of course.

Has anyone ever experienced the situation where plugging in the USB connector to the charging source (high-power USB port or Apple charger) halfway, then pressing it in firmly, results in the iPad not charging?

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It's highly likely that there is a poor connection in the phone - either a pin in the dock connector or internal wiring harness. No software fixes or "tricks" would work, but I would recommend restoring in iTunes, first using a backup and if needed restore as a new phone.
Otherwise, opening and repairing the phone takes some tech knowledge that can't be relayed here. Apple doesn't repair phones other than replacing batteries (not inconceivable that you have a bad battery), but offers "out-of-warranty" replacement (refurb) phones for $149 (US). 3rd party iPhone repair centers may be able to fix it for less. Google to find them,
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See the User Guide, Appendix B.

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If by high power you mean USB-3 you will only get 1 amp at 5 volts. You will then get 2 times the charging current of a normal USB2. Not really worth worth the effort. I have both on my computer and find that the 1/2 amp usb2 ports keep the iPad at 100 percent.
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hiya!
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hmmmmm.
let's check through some of the possibilities in this document:
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Your machine as it left the factory:
P8600(2.4GHz), 2GB RAM, 160GB 5400rpm HD, 15.4in 1280x800 LCD, Intel 4500MHD, CDRW/DVDRW, Intel 802.11agn wireless, Modem, 1Gb Ethernet, UltraNav, Secure chip, Fingerprint Reader, 6c Li-Ion, WinXP Pro
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Cheers,
George
In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you.

Have you tested external Air Superdrive with Powerbook via a USB hub?

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It has been reported outside these Apple forums that merely supplying more power to the MBA SuperDrive (in any of several ways) doesn't make it work with other machines. I've seen one website describing a hardware modification inside the SuperDrive's case (invalidating the warranty, of course) that was successful in enabling other machines to recognize and use it. It wouldn't be within the Terms of Use for these Discussions to say any more than that here; even saying that much may be going too far.

Purchased "high power" USB hub, still doesn't charge.

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