Hi Dennis thanks for the reply.I have the rectangular shape battery and it is 1800 mha two cell, I got it through advantage hobby they are fairly new and there was a article about them in last months issue of model aviation.their called a liFe battery and they are from the lipo family they have superior memory retention and are suppose to be the best receiver battery out there right now. If you don't mind send me a link to the battery your using,you say they are centrical shaped? I have have got a few responses from people about the voltage regulator and finally one from futaba and they say the receiver and servo's will be O.K with this battery. hope your flying weather is better than ours very windy right now take care Scott