Unfortunately the generation of the Battery Report is not (yet) supported, this issue is addressed internally and will be resolved within this development iteration (4.4.x).
Still, if you experience big drops on the battery percentage I’d recommend to go to the Battery settings screen and check if the inserted batteries were detected properly (if the option is set to “autodetection”), as a wrongly detected type will result in a different percentage (and thus potentially in a wrongly shown battery state).