AW: RE: unable to start up freerunner after batterie was full down
steve at openmoko.com
Sun Jul 20 21:06:49 CEST 2008
Micheal jump started my battery in about 2 seconds. It was a Young
Without the sparks or pretty assistents. Anyways, my reanimated battery
still works fine.
Anecdotal I know.
From: community-bounces at lists.openmoko.org
[mailto:community-bounces at lists.openmoko.org] On Behalf Of Michael Shiloh
Sent: Wednesday, July 16, 2008 12:44 PM
To: Joerg Reisenweber
Cc: community at lists.openmoko.org; linux4u at bluewin.ch
Subject: Re: AW: RE: unable to start up freerunner after batterie was full
Joerg Reisenweber wrote:
> Am Mi 16. Juli 2008 schrieb Michael Shiloh:
>> Joerg Reisenweber wrote:
>>> Jumpstart the battery is very unlikely to help you out.
>> Joerg, can you explain this further?
>> I've actually had excellent luck jump-starting the battery. I set my
>> adjustable power supply at about 4.5V and I connect it directly to
>> the battery terminals for just a second, then measure the voltage on
>> the battery. If the battery voltage is still zero, I repeat. Usually
>> after a few "shocks" the battery comes out of its internal under-voltage
>> I understand that GTA01 batteries have no hysteresis and need just
>> one "shock" (in fact Werner said "one electron" I think) to come out
>> of under-voltage protection. I understand that GTA02 batteries have
>> hysteresis and require more coulombs injected before they will recover.
> I'm just suspicious a shock-reanimated battery holds enough power
> (=voltage) to bring us over the boot gap, and won't activate
> protection again just in no-time when we try to pull energy. That's
> all. Of course you can shockstart battery out of protect-mode, no
> doubt. But did you get a boot with such a bat?
I thought so, yes, but I'll check again to verify.
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