Hi Ulf:
There's another problem with switching to Ni-MH and that's related to the heat generated when charging them. You can
charge Ni-Cad batteries without monitoring the pack temperature, but with Ni-MH cells you must monitor the pack
temperature. I would suggest avoiding the Ni-MH option. Either:
1. Just use modern Ni-Cad cells, no memory and much higher capacity, no change
to the charger, or . .
2. Update to one of the Li-xxx chemistries with a totally new charger. These batteries have much lower self discharge
rates and higher energy density.
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
-------- Original Message --------
Gentlemen,
I may have asked this question before...
I am looking for a modern replacement for the NiCadbattery pack used in the HP 105B. One
such 105that I salvaged have been standing on a shelf with thebatteries "happily
boiling away".
So, what kind of chemistry would be possible to usewithout to much re-design of
the charging circuitry?
Ulf Kylenfall
SM6GXV
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