One final thought, please be very careful using these packs as receiver packs. Their discharge "C" rating is not very high and you may find yourself drawing more amps than these batteries can supply (especially in the larger birds with a high servo count). If it works for you, great, just BE CAREFUL!!!
Thanks for the warning Chad. Yes, I did notice that from the Sanyo website and it must be taken into consideration. I think for the larger jets with very powerful servos these would not be up to the task but for smaller size models they look to be a good option for flight pack. - John.,