I have an older receiver battery on a plane a rarely flew. I'd like to pull it out and use it on a new plane I'm putting together and save me a few bucks. I cycled it on my accucycler a couple times, and each time it took nearly a full charge (996mah/1,000mah). I'd guess this pack is about 3-4 years old. It's a NiMH.

When/how do you know when a RX batter needs replaced? Should this one be good?