"PrecisionmachinisT" wrote in message

While I haven't seen power budgets, if an electric car manages to
take
80% of the energy that came in on the charging plug and turns it
into
forward motion, I'd be surprised.


http://avt.inel.gov/pdf/fsev/costs.pdf

The glaring error there is ignoring the batteries as an operating
cost.
http://www.plugincars.com/replacing-...ry-122261.html

I've tested high-end batteries at Segway and [a medical equipment
manufacturer] and seen a small percentage of Lithiums begin to degrade
in less than a year. The packs' built-in supervisory computer recorded
all charge and discharge cycles, temperature and remaining capacity.
The battery maker wouldn't promise more than three years life,
regardless of cycle count.

What is your experience with the same battery technologies in power
tools and laptops?

Mine isn't good. I have to employ lab tech tricks on the batteries to
keep my Makita drills and 5+ year old laptops running.

jsw