IIRC the Ipod nanos require a pullup to the +5V line (or preferably
+3V3). Something like 47k-100k did the job. Could be the blackberry is
the same.

RP

2009/12/2 YES NOPE9 <yes@nope9.com>:
> My Blackberry 9530 Storm ( which is the worst cell phone I have ever
> owned ) will charge it's battery via the USB port when I use a
> Kensington power adapter which has a USB port. =A0The BB will also
> charge with it's supplied USB charger.
>
> I built my own USB power adapter which supplies =A05V to the correct
> pins. =A0The Blackberry does not charge. =A0The only difference I can
> imagine is that the data + and - lines make some difference. =A0My
> adapter leaves these lines unconnected. =A0I don't know what the
> Kensington does. =A0I have measured the 5V and it looks okay when loaded.
>
> Any ideas ?
>
> Gus
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