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.
Yes, Karel confirmed in the iRex forums it is a single 1300 mah (see the other thread).
Now according to these numbers, "light reading" used up interlan battery after 5 hours. Of course, since battery is never depleted fully, I will guess/estimate about 1000 mAh (to be conswervative meaning 300 mAh still left).
1000 mAh / 5 hrs = 200 mA
However, Karel in the other thread stated:
"with software version 1.0 the reader consume about 150 mA per hour"
So once again they seem to be underestimating true power use. Seems like a pattern of overestimating device capabilities.
I suppose battery could be defective or not fully broken in, but highly unlikely. A more likely explanation is that the current software version is still not optimized for power use and subsequent versions might clean up these rough edges.