Tony Vandiver wrote:
> Does anyone know of a 3000mAH or better single cell Lithium Ion battery 
> (using LiPo now, but my peers wish that I would find something less 
> explosive) that comes in a flat rectangular package?  My envelope for a 
> battery is about 0.4"x6"x4".  I've found some that might fit in my 
> enclosure that are cylindrical, but I need more capacity than my 
> smallest dimension (diameter of the battery) allows.  As an alternative, 
> what are the down sides to putting multiple LiIon cells in parallel to 
> increase capacity, i.e. is there a way to maintain a balanced voltage on 
> them without a lot of danger/hassle? 
>
> Looking at the bigger picture, I've got a handheld device designed that 
> pulls 450mA at 3.7V when fully active & I'm charging via a USB port.  I 
> need about 5 hours or more of fully active operation on a single 
> charge.  I'm also concerned about the need to replace batteries in the 
> field with something off the shelf.  Cell phone batteries seem like a 
> possible fit, but it seems difficult to connect to them, and I don't 
> have documentation on the ones I've seen with 4 terminals (I'm assuming 
> that extra terminals are connections to thermistors for temp 
> monitoring).  Any recommendations?
>
> TIA,
>
> Tony
>
>
>   
http://www.youtube.com/watch?v=T0pS3Gu2_tA for a video of the cell 
failing whilst in combat and the match that caused it.
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