Has anyone dismantled a battery and looked inside ? I noticed this afternoon you can see right through them from side to side and there's nothing at all in what looks like at least 50% of the battery, all the battery cells look to be at the back where the connector is. I presume this is for heat and air flow reasons ? Surely they can add 50% more flight time to the battery by adding more cells and put a small fan in there ? just a thought.