Another battery question. In my Futaba 9c, which unlike most Futabas can be discharged without removing the battery. I recently started using it again after a period of storage. If I put it on my Accucycle and discharge it with the battery in the radio it only shows 78 Mah. When I remove the battery and cycle it separatly it shows 650 Mah, its rated capacity is 700 Mah, so I figuring it's still OK, but why the big difference?