Mark Borgerson wrote in
g:

In article ,
says...
In article ,
says...
The heck with this battery water stuff. Go Lithium-ion!
http://www.genasun.com/genasunbattery.shtml
Only 5 grand a pop!
Gordon

Which raises a question about battery-driven cars. Those LiH
batteries don't last very long in my laptop computer. How long will
they last in a car given normal neglect?


Hybrid cars are designed to keep the batteries between 70 and 100
percent charged at all times. That won't be so easy with
an all-electric car. However, they may have the system
set up to use less than the full capacity of the batteries to
prolong the life.


Mark Borgerson



Lithium-Ion batteries in any product will not discharge past 50% as
there is a built-in nanny IC in ever battery that prevents deep
discharge, which destroys them completely.

Li-Ion, unlike Ni-Cd or Ni-Mh, are FLOAT batteries like your boat. The
less you discharge them, the longer they live. What's killing his
laptop is he leaves it discharged, rather than immediately recharging it
asap, or doesn't recharge it until it's fully run down, the complete
enemy of the Li-Ion battery pack. Continuously discharging a laptop
battery to the point of shutdown....then leaving it in this state for
hours instead of diligently recharging asap just kills them.
REcharging, even if only discharged 5%, asap will make them last the
life of the laptop. Leaving them plugged in with the CHARGED light on
does NOT destroy laptop batteries.

There is one problem with Li-Ion battery packs....out of sync. The
discharge curve stored in the IC gets further and further from the real
charge state as time goes by in all Li-Ion/Li-Polymer battery packs.
So, they APPEAR to hold less and less charge over time. What happens is
the charging state IC's charging curve becomes out-of-sync with battery
reality. To reset this IC, discharge the battery as far as the IC will
allow you to, to the point of automatic shutdown...then, IMMEDIATELY
recharge fully to recharge autoshutdown. Test the battery runtime and
if it's still shorter than it was, repeat this procedure no more than
three times. If it continues to fail, the battery pack is defective and
should be replaced. But, you'll find many "bad batteries" will simply
restore after 1 or 2 "cyclings" to reset the IC's charging curve to
reality.

My Gateway laptop and its original battery pack are 9 years old. The
battery pack has been "reset" about every 6 months since it was new,
recharging in between these resets (above procedure) as soon as possible
no matter how much it was discharged by portable operation. Battery
pack runtime is down around 10-15% in 9 years of operation like this,
which is way beyond its service life. A little care and loving can
really extend a Li-Ion/Li-Polymer battery life.

NEVER RUN DOWN YOUR SELLPHONE BATTERY ANY MORE THAN YOU ABSOLUTELY
MUST...Plug it back in to recharge at every opportunity and stop
bragging about you only have to charge it twice a month. Do the above
deep cycle once every 6 months. You'll never need another battery for
it. Leave it plugged in as much as you can really lengthens its service
life. DEEP CYCLING Li-Ion/Li-Polymer batteries over and over is
suicide...just like a boat battery.


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Larry
You can tell there's very intelligent life in the Universe
because none of them have ever tried to contact us.....