"Suggestions such as "You can safely fly well into the 8 volt range" are dangerous." - I routinely fly down to 8.6 volts. Never had a problem, BUT I'll add that my TX actively monitors the battery and sounds an audible alarm when the battery voltage hits 8.6v at load, which means it is time to land now. However you are right Piper, being the beginner forum, most probably aren't using a high end radio that does this level and accuracy of battery checking. My mistake and you are right it could be very dangerous. I guess we all become used to the equipment we personally use... I got lost in that. For a "needle" based voltmeter like found in most beginner radios, assuming it is working correctly, I'd agree you need to stay in the 9V range. Your 9.4V is conservative, but safe which untimely is more important than run time, so no argument there. Cheers.