To stop you just go back into Device Analyzer, select option and then choose stop.
In this case to stop "Battery draining too quickly" the path is: Options > Device > Advanced System Settings > Blackberry Device Analyzer > Battery Tests > Draining Too Quickly > Stop
Running .267 on my 9900, and average 2.20 to 2.38% usage per hour on an average workday.
That's with constantly receiving work and personal e-mails (both constantly, especially the work ones), a few phone calls, some web surfing, and occasional Facebook stuff.
I turn Wi-Fi on at work, then turn it off when I leave and turn Bluetooth on in the car. Make sure both are off when I get home.
I usually have it on from 7:00AM 'til around 10:00PM and end up with an average of about 40% left before turning it off and charging until the next morning.
After seeing what percentages some others are getting, I won't complain. Not as good as my 9700 was, but still bearable.