AW: RE: unable to start up freerunner after batterie was full down

[steve]

Ya jOERG,

 Micheal jump started my battery in about 2 seconds. It was a Young
Frankenstein momement!
 Without the sparks or pretty assistents. Anyways, my reanimated battery
still works fine.

 Anecdotal I know. 

-----Original Message-----
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
down



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
protection.
>>
>> 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.

Michael

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