Is it possible to charge 3x NiMH AA (eneloops) in series with a TP4056 module?
I know that TP4056 will automatically cut off charging when Li-ion reaches 4.2v.
So 3x 1.2v Ni-MH = 3.6v, TP4056 starts charging.
When NiMH reaches 1.4v then it will be 4.2v in series and TP4056 shall stop?
My TP4056 module is modified to charge at 200mA rate instead of the default 1A rate.
Will it work?
No, use the right charge controller for the battery chemisty - unless of course you want
to wreck your rechargables or start a lithium fire.
would it really destroy the NiMH cells? I thought they were more rugged than Lithium cells.
But there are 100's of charge controller chips for all types of battery available, just choose the
right one?
Yes, even rugged NIMH cells can be destroyed by incorrect charging methods. You would be better with a resistor based current limited trickle charge on the NIMH than the totally wrong charger chip. Though even the constant current trickle will eventually kill the NIMH prematurely.