6 May
1999
6 May
'99
4:34 p.m.
Francois wrote:
Hi all,
I know we already had a discussion on that topic but I can't remember what
was said since I was not too interested at the time.
Some of you mentioned that it was possible to restore "dead" batteries from
laptop. The ones in question are NiCads and very much dead as far as I can
tell.
Any info appreciated
There is a chipset that can "restore" dead NiCads, but I don't recall the
manufacturer or part number. Basically it measures the voltage, puts a high
current short pulse into the cell, waits, measures, and repeats the cycle. A
friend of mine made up a test circuit using these chips, and brought quite a
few dead cells back to life. My understanding is that a more modern version
of that chipset is now being used in the charger circuit for laptops and
other NiCad apps.