On 12/22/22 11:42, Paul Koning wrote:
I just read the battery chapter of the ARRL Amateur
Radio Handboo,
which discusses this particular point at some length.
Among many other points it says (a) you can trickle charge a NiCd but not a NiMH, and (b)
NiMH requires a more complex charging algorithm than NiCd, so that NiMH chargers are also
capable of charging NiCd batteries safely, but NiCd chargers cannot charge NiMH cells
without the risk of damage.
I suspect NiMH charger circuits can be found. Buying $3 Chinese ones may work, or not; I
keep remembering that China disallows selling unsafe equipment within the country but
doesn't have any rules against exporting such things.
A good read on the issues of NiMH battery charging can be read here:
https://www.electronics-notes.com/articles/electronic_components/battery-te…
It pretty much says that "you're damned if you and damned if you
don't". I wonder how many really good NiMH battery chargers are out
there. Give me LiFePO₄ any day!
--Chuck