Answer to Gr8adventure
1.Bateery, if it is what it claims to be, it is GREAT! Obviously it is not
2.Min. fan speed. You can forget it! or Press "SET1" a few second till P appreaing, press "SET1" a few times till "UdC" appearing, Press left arrow "<" (I guess that you forget this step), and "AUTO" will blink, press "+", "-" to minimum speed of fan.
3.AUTO mode: please test it in your smoker, not on your desktop. What you mentioned is feature of P.I.D controller, a great feature than drawback