John thanks for the reply.and yes it's 6.6 volts each cell is 3.3 volts because it's a liFe battery. it's in the lipo family, there are suppose to be one of the best receiver battery's out there. you can find them at tower hobbies or at advantage hobby.also there was a article in the last month's issue of model aviation on them. they have superior memory retention and perform way better than a ni-cd or nimh packs do. Like i said in my posting tower hobbies web site says that it is fine to run with out a regulator and so far from me hooking it up and playing with the servo's it has worked just fine. but for piece of mind I was still thinking of putting a regulator just to be safe. I know you have to step the voltage down when you are running lipo packs or when your reaching 7.4 or higher, but was wanting to know what other people thought of this. thanks again for the reply Scott