ORIGINAL: Hypersprint
Using a UBEC do you get any indication that you are about to run out of battery and if so what is it and how long do you have to get your plane down?
Nope no indication.
That is why you should always check the battery state after the first few flights.
I use a rough estimate... for freshly charged packs.
800mAH battery pack = check after 2 flights and thereafter
1200mAh battery pack = check after 4 flights and thereafter
1800mAh battery pack = check after 6 flights and thereafter
etc.
Check with the plane switched off and a voltmeter that places a load on the batteries.