So I've been have trouble with voltage on my quadcopter. I am still learning so I keep it low, but recently I've been going higher up. I'm a little nervous about the battery because my quad starts descending slowly, gaining speed in the process. I get somewhat of a warning because it becomes sluggish, but at a high altitude I may have trouble getting it down in time. Also, when I plug it back into the charger, it says there is 10.30 volts left! I haven't tried measuring the voltage with my multimeter, but I will. Is there anyway I can know the voltage? I know I can use telemetry through my laptop, but I don't always have it with me. Is there a module I can use to monitor it that I can put on my transmitter? I would use an alarm, but most go off at 9.3 volts, which I think is too low.
Thanks for your help!