While I agree with most of your post you definitely CANNOT disconnect the
battery and have the car keep running. Today's cars have a lot of
electronics that need clean noise free power. The battery filters the noise
from the alternator. Without the battery there is enough noise generated by
the alternator to destroy the computer and most of the electronics.

your battery light comes on not because your battery isnt getting
charged but your not getting enough voltage....Thus your Alternator is
on the blink...You dont even need a battery in the car after you start
it and the light wount come on... Have your alternator checked before it
goes out and you have to replace the alt and the battery...Also if your
alt checks good take it to the dealer i think theere is a updated
reprogram fo the PCM on this model
s Cook

Re: 2000 CAVALIER

Group: rec.autos.tech Date: Sat, Jun 4, 2005, 3:38pm (CDT+5) From:
none@none.com (Steve B.)
My battery light comes on every now & then. My battery is almost 2 years
old & I drive about 50 miles a week. Any reason for this??? Thanks!
Your battery light comes on because the battery isn't being charged for
some reason. Chances are good that you have an alternator on the way out
but with the little bit of info you provided this is only a guess.
Steve
B.