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
Corkey05 wrote:
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.”
Ni-Cad memory is one step removed from a MYTH..
Fact: If you charge and discharge to EXACTLY the same points hundreds of times EXACTLY the same point. Memory develops.. The fence post gets a different amount of sunlight every day so unless the batteries are FULLY charged in the day and FULLY discharged at night no memory save for 100% and that's kind of the factory setting.
NASA. orbits satellites After hundreds of orbits with EXACTLY the same load on the batteries and EXACTLY the same numbers of full sunlight they develop memory.
now.. Filaments.. that's another issue
As you discharge the battery metal from the housing is "Eaten" by the chemicals inside generating electricity.
As you charge metal is "regurgitated" as it were and deposited MOSTLY back on the shell (housing) however not always.
FIliments eventually develop. and for those a very very very fast charge can pop 'em like a fuse. Restoring the battery
You call it memory
It is really a shorted cell.
