Rick,

The early "packagers", as opposed to manufacturers, are charging huge markups.  It's not too hard to buy cells wholesale and build your own packs.  The electric vehicle forums have lots of details.
On Jan 18, 2011 8:52 AM, "Rick Titsworth" <rtitsworth@mindspring.com> wrote:
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> Hmmm, this would be great (weight reduction), but it seems a bit fishy…
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> For comparison, a DCB120 12v Dewalt Li-ion hand tool battery is 0.5lbs, $50, and is rated at 1.3 AH
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> So, 4 of them would be 2 lbs, $200, and 5.2AH
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> Since the DeWalt Li-ion are apparently fairly advanced, I don’t see how this (below) is ~ 300% better for same cost/weight.
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> Would love to know more.
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> ________________________________
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> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Lorn H Olsen
> Sent: Monday, January 17, 2011 9:57 AM
> To: lml@lancaironline.net
> Subject: [LML] Lithium Batteries
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>  
>
> As I look for a replacement for my BC100-1 (ODYSSEY PC925) battery, I ran across (suggested by Wolfgang) the following batteries.
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>      http://www.batterystuff.com/batteries/motorcycle/LFX18L1-BS12.html
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>      http://www.shoraipower.com/t-faq.aspx
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> At only 2.5 lbs (compared to 25 lbs) and a reasonable $181 price these batteries appear to be a real breakthrough.
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> Does anyone have any practical experience with the lithium batteries?
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> Lorn
>
> --
>
> Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
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> DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
>
> LNC2, FB90/92, O-320-D1F, 1,780 hrs, N31161, Y47, SE Michigan
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>