I found out why my tablet's battery sometimes drains. I don't
know if others are similarly affected, but I'll explain in case it
might help and to see if someone can offer a solution.

I have my n810's wireless to "always ask". At home, I leave
it permanently connected without problem - the power
management of the tablet is fantastic really. HOWEVER, if
I leave my house and the wireless disconnects after signal
loss, the tablet is left in a state with wireless activated *AND*
power management set to OFF (I can check with iwconfig).
Of course, this causes a large batter drain.

This is not proper behavior. If you manually disconnect the
wireless goes to an off state called "not ready" in iwconfig.

I have to reboot to reset the wireless to proper state and then
the battery no longer drains.

Does anyone know a fix for this?