[ausev] anyone heard of these guys?

[Brian Lasseter]

On Dec 11, 2007 6:55 PM, Josh Handel <jhandel at ktomics.net> wrote:
> http://www.lifebatt.com/
>
> I don't know enough to know if they would be any good, but I figured I
> would point them out :-).. (I like their cycle rate for the weight
> :-P)

Interesting, I have not heard of them...

So lets compare it to a Trojan T-145...
http://www.trojan-battery.com/Products/ProductSpec.aspx?Name=T-145

The Trojan is 10.38" x 7.13" x 11.5", at that size I think I can cram
56 of those Lifebatt cells in the same size box (I'm presuming they do
not need the connector tabs in a box).  That's 7 x 4 x 2 = 56 of the
LifeBatt cells.

If we connect the 56 Lifebatt cells in 2 parallel strings of 26 cells,
we get a 6.4V battery with 260Ah of energy.  The T145 has a voltage
just over 6V, the same, with a capacity  of 244Ah.  The Lifebatt has a
little more capacity than the T145 in the same volume.

56 Lifebatt cells will weigh 20kg, and the Trojan T-145 weighs 33kg.

In the final analysis, you get 6.5% more Ah, you save 40% of the
weight, and you pay 3000% more for the lifebatt.  The T145 costs about
$100, while the Lifebatt will cost you $3080.  And that is not
including the extra cost for their chargers, and battery management
system, or your cost to assemble 6V car size batteries from the cells.


So... Even if the Lifebatt cells last 3x longer than the T145 battery,
which their warranty assures, the cost-to-benefit ratio is still way
out of wack.  I'll stick to Lead-Acid.


-- 
TTFN,
Brian "Lasso" Lasseter

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