Hi David:
The chemistries are very different. Ni-Cad is endothermic whereas Ni-MH is Exothermic. This is why chargers for Ni-MH
have a mandatory temperature sensor. This is one of the reasons I say Ni-Cad cells batteries are easy to charge.
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
The lesser of evils is still evil.
-------- Original Message --------
NiMH batteries are close the same voltage and charge the same as NiCd and are more available and not toxic when
disposing of them. They should be a good replacement. Lithiums are very different in voltage and charging.
David N1HAC
On 9/14/16 10:19 PM, Jeremy Nichols wrote:
Thanks, Brooke, I'll price new Ni-Cads. I wasn't thinking of lead-acid (gel
cells) but rather lithium rechargeable, providing I can find a type that
won't catch fire and will work with the 105B'scircuits.
Jeremy
On Wednesday, September 14, 2016, Brooke Clarke <bro...@pacific.net> wrote:
Hi Alex:
Yes, I'm recommending Ni-Cad but NOT any acid type.
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
The lesser of evils is still evil.
-------- Original Message --------
Hi Brooke,
sorry I have to disappoint you; Ni-Cd batteries do not use any acid, they
have K-OH kalium hidrioxid [potassium hydroxide for anglophone ] as
electrolyte and they are normally very air-tide, and widely used in radios.
73
KJ6UHN
Alex
On 9/14/2016 4:45 PM, Brooke Clarke wrote:
Hi Jeremy:
It's a very bad idea to put any battery with acid in an enclosure that
has electronics since if it vents the acid will etch the PCBs.
Guess how I learned this. I got a great price on a Gibbs Frequency
Standard because the oven no longer worked.
http://prc68.com/I/office_equip.html
Modern Ni-Cad batteries have much more capacity than older ones and no
longer have a memory effect. They are also very easy to charge, so why not
just replace the old cells?
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