I sent another post of the same message, but I messed up sending it to one individual.  Sorry for the mistake.

My question is during the last two times I waited until the failsafe alarm went off to land my hexacopter.  Although, when the alarm went off, I lost power at my radio.  I was near landing and I believe it was preparing to RTL at 9.6 volt (low battery) due to my settings.  The copter was low enough to touch the ground, but the sudden acceleration tipped the copter so one of my blades got to mow my lawn.  I could not disarm until the copter decided to shut down.  

Should I go to some other setting for short flights, or is something else going on that I am overlooking?

Thanks.