Yeah, a good charger will at the very least base end-of-charge on the voltage of the battery being charged. Some, like the MH-C9000, also have individual temperature sensors to detect when the battery is full by the way the battery's temperature begins to rise when it reaches a full charge. The...
Yes, the MH-C9000 is a good charger but definitely can be a bit overkill if you don't need all the capacity testing & discharge features. It is nice though being able to test your batteries periodically to keep tabs on how they're holding up or to pick out failed batteries or batteries that...