ORIGINAL: Magne
That means grabbing the model and some flight packs and going, it is just easier if you don't have the extra reciever battery.
Use a small 2s Li-po for Rx-pack, and charge it when you get home after flying. Put it together with your flight packs. That way it is fully charged and ready for next time you go out, whether this is the following day or a month later. Replace after a couple of years.
Regards,
Magne
This is a good way to puff your RX pack. LiPo's should never be stored in a fully charged state. It only takes 15 minutes at 1C to charge an RX pack so why worry...
Cheers,
Jason.