Yeah i guess i will correct my self. Im not a mac user. Sorry.
Windows machines have an industry standard of 500mA (not amp hours, also
right, batteries have a discharge capacity rated in time as well. )
On Wed, Mar 14, 2012 at 1:03 AM, N.A. Nada <whodo678@comcast.net> wrote:
> I thought the Apple male/female USB cable came with my MBP, but after
> looking at the original packaging, it must have come with my Quicksilver. I
> don't buy knock-offs so it must have come with an Apple product.
>
> The Quicksilver has no USB port on the front, so a male/female USB cable
> makes sense.
>
> I assume the "3-way" is passive hub. It is a Belkin swivel hub, but has a
> port to accept a wall wart. Yes, the power would be split if there were a
> draw, but like I said, the scanner is the only one that draws power from
> the USB cable. When the hub is plugged directly into the MBP, there is no
> power issue with the scanner. The only change is to add the male/female USB
> cable between the MBP and the hub.
>
> I'm trying to avoid going back to a powered USB hub and the extra power
> usage.
>
> Brent
>
>
> On Mar 13, 2012, at 5:41 PM, Otto Nikolaus wrote:
>
> > On 13 March 2012 17:27, N.A. Nada <whodo678@comcast.net> wrote:
> >
> > >
> > > Thanks for explaining the mechanics, or I guess the electronics of it.
> > >
> > > While you are there, I was wondering if you could give an opinion on
> > > another USB power question.
> > >
> > > I am trying to space a USB three way away from MacBook Pro. When
> plugged
> > > in directly, I can power my Canon LiDE30 scanner. I have mixed results
> > > trying my three 30-inch male/female USB cables.
> > >
> > > The Griffin is the smallest diameter, and functions the best, but it
> > > apparently providing just enough power. A generic cable is providing
> just
> > > under enough power, where it might work once of twice, but not enough
> for
> > > multiple scans. It is the common diameter. Both of these will light
> the LED
> > > on the Belkins 3-way.
> > >
> > > And then I have an Apple male/female USB cable, that came with my MBP.
> It
> > > can not even light the LED in the 3-way, but is the largest diameter,
> > > similar to a Firewire cable.
> > >
> > > My question is there no standard for power transmission over USB
> cables?
> > > I'm trying to move the cable clutter just a little further back from
> the
> > > MBP.
> > >
> > > I think the total distance from MBP to scanner is right about 6 feet.
> The
> > > scanner is the only one that is USB powered, other than LED.
> > >
> >
> > I've not heard of the Apple male-female USB cable. What would it be used
> > with?
> > Is the "3-way" a passive hub? You do realise that if it's passive, the
> > available current has to be split 3 ways?
> >
> > Otto
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