[time-nuts] HP 105B: Modern replacement for NiCad battery pack?

paul swed paulswedb at gmail.com
Fri Jan 5 12:00:22 EST 2018

A drop in replacement for nicads is nickle metal hydride or NiMh. Nicads
are still available but can be expensive.
The other comment I would make is the 1970s charging circuits were pretty
crude and lead to boiled batteries.
If your going to invest in an internal battery you may want to consider a
smarter modern charger.
There seems to be all sorts of very nice boards out of China for little
cost. Its amazing.
If you go the alternate approach you may consider Lithium batteries.
Drones seemed to have made a very nice market for batteries and smart

On Fri, Jan 5, 2018 at 11:46 AM, Ulf Kylenfall via time-nuts <
time-nuts at febo.com> wrote:

> 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
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