Originally Posted by wallcraft
I think this conclusively demonstrates that the DR has a single cell 1300 mAh battery.
Power from single cell 3.7V 1300 mAh battery = 4.8 Watt Hours
Power from four 1.2V PowerEx 2700mAh batteries = 13.0 Watt Hours
This is consistent with 5 hrs vs 12.5 hrs, and also suggests that the DR1000S is drawing about 1 Watt.
Hmmmm, sounds about right except I am still bit confused:
4.8 Wh = 5h = 1A load, 1W power use
Now adding 13 Wh from AAs:
4.8 + 13 = 17.8 Wh / 1W = 17.8 hrs
Assuming both fully loaded DR battery and 4AAs according to this we should get 17.8 hrs as opposed to 12.5 hrs!!!!
Question: Did you use brand new Powerex AAs? Were they broken in? Did they reach their full capacity?
P.S.: Not sure what is the load while charging. Don't have data for 2700. For 2500 at 1A we get about 2.8 Wh, slightly less than the calculation above.