It has been my experience that both chemistries have thermal cutouts for
overcharge limiting and both can use chargers that detect the negative
voltage slope when the cells heat up once they are fully charged, hence
the ability to use the same chargers for NiCd and NiMH. I have many
radios that started out with NiCd batteries and the newer replacements
are NiMH.
David
On 9/16/16 2:37 PM, Brooke Clarke wrote:
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.
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