On Jan 10, 3:16 pm, Mxsmanic wrote:
JD writes:
They have a weight to Watt ratio less than 1 lb / 1500W ( .9 to be
exact).A watt is not a measure of energy storage. Perhaps you are thinking
of watt-hours or something similar?

Also, the greater the energy density, the greater the potential hazard
(as already exists with many lithium batteries)
--
Transpose mxsmanic and gmail to reach me by e-mail.

These Li-Ions don't have the same safety problem as the conventional
because of the Iron.
from their website on this subject:

"A123 M1 cells are intrinsically safe and eliminate the risk of
explosions and thermal runaway associated with conventional Lithium-Ion
batteries that use oxide active materials. To achieve this, the active
materials in A123's technology are not combustible and do not release
oxygen if exposed to high temperature or in the event of battery
failure or mechanical abuse."

Yea.. I'm not real sure about the units here... but they do site a
power density of 2700W/Kg see:
http://www.a123systems.com/html/tech/power.html