npalen said:
The two 2800 mah batteries would equate to about 7.5% more energy than the stock 5200 mah. That would equate to about a minute more flight time if currently getting 15 minutes. I would stick with the convenience of the stock battery setup.
as a Phantom 1 flyer, where I get maybe 6 minutes a flight all loaded up, I fly around, get the shots, and land
I'd have to say that 15 minutes is a bountiful amount to fly.
you really have to say "how long is long enough?"
unless you're really planning to fly deep over water or long distances, .. there's no point in loading up a Phantom or Phantom 2 with dual batteries, . you'll get longer total flight times with single batteries. just land and insert another battery.
Also makes it a bit easier to deal with movies as well.. having multiple flights and movies makes it easier to manage in a way.