External battery charger

William Kenworthy billk at iinet.net.au
Thu Jan 1 04:35:24 CET 2009

Or with a recent uboot - plug into usb and wait for 10-15 minutes.
Remove usb and battery for 30 seconds, plug back in and it should
bootup.  You may need to remove/replug the usb to make sure its charging
properly once up.

USB defaults to 100ma, not enough to boot the FR, but it will
tricklecharge it when off until enough of a charge exists to boot - once
past the intial boot stage, the CPU negotiates the full 500ma and all is


On Wed, 2008-12-31 at 21:16 -0500, Ian Stephen wrote:
> Quoting Jan Henkins <jan at henkins.za.net>:
> > Hello all,
> >
> > Hope somebody can help:
> >
> > I perpetrated the "cardinal sin" to let my FR battery run completely
> > empty,
> <snip>
> > In the meantime, is there any (non-destructive) way to coax the FR into
> > life with the flat battery, so that I can charge it?
> What I've done is boot the Freerunner with the spare battery, plug in the wall
> charger that came with the Freerunner (or force 500 mA charge on a suitable USB
> charger supply) then remove the spare battery and put in the FIC battery.  The
> Freerunner will run without battery when the wall charger is plugged in and
> will charge the FIC battery once it is inserted.
> IanS
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William Kenworthy <billk at iinet.net.au>
Home in Perth!

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