Quick review of battery drain usage during hostmode.py activated.
Exported form BatteryGraph v.0.3.2
Note - after installation of hostmode kernel I enabled hostmode.py instantly.
SEP.25 - 16:30 to 19:05 I'm using Original battery BL-5J, after 19:05 to 21:00 o'clock using second battery.
First battery shut down the phone without notice at 19:05. with usual low warning message .

SEP.26 hostmode.py was enabled from 09:20 to 11:20 for testing, mainly using only powered HUB. logfile , it was published before on my second post, but now is uploaded on other location, more easy accessible, and no restriction.

The drainage is the same no matter does I use external powered hub or just directly supply power for single USB flash drive.

Battery discharge is around 2 hour and 20-30 minutes.

Graph - PNG on Dropbox
ZIPPED PNG with notes here

Remember this it PreAlpha yet.