Product review (3 stars): Great w/ One Stupedly Designed Drawback
Easy to program for special uses.  Easy to adjust given that they want a quasi tight box. Quite flexible.

So what's my beef?  If you forget to turn off the transmitter, it will alert you so that the battery doesn't run down to too low of a level, which can permanently harm the battery.  Good idea if implemented right. So how did Spektrum implement it?

A buzzer goes off (can't alter this even though the option is available for other functions) and a vibrator goes off (can't alter that either).  So if the transmitter is on your desk and you stepped way to weed the garden:
- the buzzer is really loud and rapid and vibrator really severe.  Combined, both draw down the battery rapidly, doing exactly the opposite of what was intended (save the battery).
- the vibrator is so strong that if it is on your desk or a table, the transmitter quickly moves of the top and drops to the floor, breaking the control sticks.
- then when power does go off, if your ship was also left on, it might go into a lost signal reaction and start rotating the props to fly to a safe height so it can return to launch (not good if your ship is in the house or a kid is looking at it.

So let's summarize.  The "how-dare-you-walk-away-from-me-and-don't-play-with-me-alarm" is:
- dangerous to the battery
- not safe to people and property

What would be a reasonable alarm or approach?
1) Give folks the option of at least turning off the vibrator for this alarm so it doesn't vibrate off a desk and break something.
2) Maybe a single loud beep once a minute or so