Difference between NiCad and NiMH batteries
My fence post tops for the steps to my permanently parked travel trailer have 2 solar powered led lights with rechargeable - AA NiCad batteries. Do I have to replace those batteries (one is no good)...
Forum Discussion
Charge rate is different, so you're taking a chance of battery damage if you change to NiMH.
"Nickel-based batteries are best fast charged; a lingering slow charge causes “memory.” Nickel- and lithium-based batteries require different charge algorithms. A NiMH charger can also charge NiCd; a NiCd charger would overcharge NiMH. Do not leave a nickel-based battery in the charger for more than a few days"
The above taken from Battery University
That said, I changed to NiMH for my solar powered shed lights and they worked fine.
"Nickel-based batteries are best fast charged; a lingering slow charge causes “memory.” Nickel- and lithium-based batteries require different charge algorithms. A NiMH charger can also charge NiCd; a NiCd charger would overcharge NiMH. Do not leave a nickel-based battery in the charger for more than a few days"
The above taken from Battery University
That said, I changed to NiMH for my solar powered shed lights and they worked fine.
