Originally Posted by pilotbob
Interesting idea. I was thinking you were just going to charge up both, and leave the external battery/charge hooked up to the DR and see how long it would last. I would be interested to know.
Well, I didn't feel like dragging it around with the umbilical cord attached unless I had to. Besides, between the 2 batteries (internal and external) there is X amount of energy stored and I don't think the timing of when it is transfered around plays a big role. More likely usage will have a bigger impact.
I'll try it when I get around too, but due to the above, I'm not sure how indicative that time will be in comparison.