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There are many external battery packs which have a USB port for charging your iPad or iPhone on the go. But they all seem to be charged via a Micro USB port themselves, rather than a dock connector.

Why?

Is there some technical reason or does Apple not license the female dock connector?

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    Oy vey, why the down vote? – Robert Atkins Mar 8 '12 at 15:30
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Actually, many do. Here's one example, and here's another.

The reason is probably licensing. Apple charges a fee for developing products using this connector, and I believe there's also a very small per-port royalty (as with FireWire).

  • They're iPhone-only "battery cases", but it's a good start. Got a link for an external battery pack (~4000mAh) you can charge an iPad off? – Robert Atkins Mar 9 '12 at 8:58
  • Sure - I've used this one for a couple years; works well: newtrent.com/IMP50D-dual-USB-5000mAh-iphone-battery-p/… – David Mar 10 '12 at 16:49
  • Ah, that pack charges itself off Micro USB, which is not what I wanted. I want an external battery pack which charges itself from a dock connector socket. – Robert Atkins Mar 11 '12 at 5:52
  • What's the point, other than 1 less cable to carry and a higher product price? – David Mar 11 '12 at 19:46
  • ... and one less charger, which is a pretty big point. – Robert Atkins Mar 13 '12 at 11:51

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