Just to let you know Li-Po batteries are not without fault!

  http://www.youtube.com/watch?v=-DcpANRFrI4&NR=1

Gemma.

Date: Wed, 18 Mar 2009 16:40:44 -0400
From: Rob Scheibel <robscheibel@gmail.com>
Subject: [Gumstix-users] Batteries
To: gumstix-users@lists.sourceforge.net
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	<e177b4830903181340j43e6b918q4c8ee47622c25ad3@mail.gmail.com>
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Gumstix Users -

I'm curious to hear how people have been hooking up batteries to their
gumstix's?

Have you been pulling off the DC coupler on expansion boards? Creating your
own expansion boards and using the VBATT pin's? Using a coupler plug and
connecting that to your battery?
  
    
For "production" systems I just use the VBATT pin breakout-gs/vx. In one 
system there was already a 5 volt regulator so I just wired straight 
into that, in another the main voltage was 8.4v (x7 1.2v Ni-Mh AA cells) 
so I used an LM7805 regulator.

In some "development" situations i've cut the mains end off DC brick 
that gumstix supply and used the DC connector. This is nice when you 
need to unplug things because your not sure on wiring but on occasion 
the plug has fallen out.
  
I'm trying to figure out the best way to go about it and wanted to hear some
stories from others. I've searched the net quite a bit and found many people
doing it different ways, but wanted to see what those that are most active
here are doing.

Also, if you have any battery or charging component recommendations, I'm all
ears!
  
    
With Ni-Mh AAs I just them wired in parallel to the gumstix and to a 
charger. Up until recently the charger was just a variable DC power 
supply but now i'm playing about with using expensive peak chargers that 
are usually intended for rc hobbyists who use Li-Po batteries.

Colin.