I'm going to testing a switching power converter in conjuction with li-polys. I'm going
to be using it with a robostix/gumstix, but I'll let every one know how it goes.

On 11/21/06, timcrawford@comcast.net <timcrawford@comcast.net> wrote:
Hi Russell,

We have talked about this before and seem to agree
that you should get about 80%-90% of the capacity before
it shuts down.  No one has posted results so let
us know how it works.  The battery you are looking
at is 800mAH.  The gumstix uses ~200 mAH so
you should see about 3 hours run time.

Tim


 -------------- Original message ----------------------
From: "Silva, Russell" <rsilva@rsasecurity.com>
> I'm looking to battery-power my gumstix/breakout board/wifistix
> combination and have a few questions.
>
>
>
> It seems accepted knowledge that three 1.5V batteries are required to
> power the gumstix.  The enclosure I am looking to put my gumstix in has
> room for only two AA batteries, so I'm seeking an alternate solution.
>
>
>
> Does anyone have experience with using single Li-Ion batteries?  I'm
> looking at
> http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=477.
> 3.6V is very close to the minimum recommended 3.5V, and 800mAh is not
> much capacity.  With two wired in parallel, though, I'm hoping for
> between half an hour and an hour of battery life.  I can recharge and
> replace batteries frequently, so this would be sufficient if it worked.
> I imagine wiring them in parallel could be done by rewiring the
> enclosure's battery compartment.
>
>
>
> I'd appreciate any advice or comments people could give.
>
>
>
> Regards,
>
>
>
> Russell Silva
>
>





---------- Forwarded message ----------
From: "Silva, Russell" <rsilva@rsasecurity.com>
To: "General mailing list for gumstix users." < gumstix-users@lists.sourceforge.net>
Date: Tue, 21 Nov 2006 21:49:44 +0000
Subject: [Gumstix-users] gumstix and batteries

I'm looking to battery-power my gumstix/breakout board/wifistix combination and have a few questions.

 

It seems accepted knowledge that three 1.5V batteries are required to power the gumstix.  The enclosure I am looking to put my gumstix in has room for only two AA batteries, so I'm seeking an alternate solution.

 

Does anyone have experience with using single Li-Ion batteries?  I'm looking at http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=477 .  3.6V is very close to the minimum recommended 3.5V, and 800mAh is not much capacity.  With two wired in parallel, though, I'm hoping for between half an hour and an hour of battery life.  I can recharge and replace batteries frequently, so this would be sufficient if it worked.  I imagine wiring them in parallel could be done by rewiring the enclosure's battery compartment.

 

I'd appreciate any advice or comments people could give.

 

Regards,

 

Russell Silva


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