I'm not sure I understand what you mean...
But the slam dunk has a much lower power consumption than the bebop 2, only 25W or so.
You don't need a big battery to power it. In fact it works quite well with a bebop 1 battery. I haven't exactly measured the full autonomy of that but it's around an hour. The bebop 2 also supports carrying it on top of the slamdunk.
If you don't have one lying around, it's a 1200mAh, 11.1V battery.
Does it answer your question?