unable to start up freerunner after batterie was full down
joerg at openmoko.org
Mon Jul 14 08:06:34 CEST 2008
Am Mo 14. Juli 2008 schrieb Marco Trevisan (Treviño):
> Joerg Reisenweber wrote:
> > Am Mo 14. Juli 2008 schrieb Marco Trevisan (Treviño):
> >> Michael Shiloh wrote:
> >>> The final method involves charging the battery manually, enough to allow
> >>> Freerunner to boot. This requires an external power supply of about 4.5
> >>> Volts and should be done only if you feel comfortable with electronics
> >>> and hardware and understand about short circuits.
> >>> Let me know if you want to do this and I'll instruct you privately.
> >> Well, maybe this could be useful for other owners, isn't it?
> > We mustn't advice customers to try potentially destructive or even
> > procedures.
> > Thus no public howto for manual charge of LiIon batteries!
> Well, I don't think that one would to that just for fun... I figure that
> who will try a procedure like that is enough experienced and/or wants
> to risk with his own device.
> I'm simply saying that the method should be well documented in public
> (since it's not the first time that occurs) underlining that it's only a
> very dangerous "tip" and that the Om team doesn't suggest it, then
> everyone can decide if following it.
> PS: BTW I hope I won't use it since I've ordered also some extra an
> battery and I've some compatible ones near me; I just wanted to express
> my idea...
Actually I don't recommend this, not even with warning note. There are better
ways do cope with this: hotswap or external LiIon charger/other cellphone.
Battery has max chrg V of ~4.2V and max I of ~1A. Anybody needing to know more
on it, shouldn't even think about it. The ones who think they understood the
above: formating charge current when bat is deeply discharged shouldn't even
exceed 50~100mA! Otherwise U might kill bat. LiIon is tricky!
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