Yes, I've learned to keep wifi off, and i have seen much better battery performance.
My KF HD takes exactly 30 seconds to boot up after a shutdown. I have been leaving it in sleep, but force closing any games under "applications running" before bed each night.
Is GSam free better than HD monitor free? HD monitor free seen here...
http://www.amazon.com/smallte-ch-Bat...rds=hd+monitor
It has 2000 reviews at nearly a 4.5 rating.