I just got one of those Baygen Freeplay radios that don’t use batteries. They have a spring you wind up that spins a little dynamo that charges a NiCad battery (theres also a small solar panel).
I’m wondering, I seem to remember hearing that NiCad rechargable batteries have a “memory” that gets screwed up by under charging. Wouldn’t the constant partial charging/depleation wreck this?
Also don’t NiCad batteries have a limited lifespan in which they can hold a charge?