Using the FPV250 build from your show and the FlySky T6 radio, what is the best way to know when ...

[G+_Mark Newnam]

Using the FPV250 build from your show and the FlySky T6 radio, what is the best way to know when the battery is running low?  I want to make sure I don't drain the LiPo batteries beyond the safe point. 

[G+_Fr. Robert Ballecer, SJ]

I've got EXACTLY the thing for you... 

 

BOOM! http://hobbyking.com/hobbyking/store/__18987__HobbyKing_8482_Lipoly_Low_Voltage_Alarm_2s_4s_.html

[G+_Mark Newnam]

Perfect.  I knew there had to be something better than using a timer on my phone.  Thanks!

[G+_Donald Burr]

Those things are awesome.  I always have one Velcro'd onto any currently-in-use batteries.  And the alarm is LOUD! which is what you want considering these things tend to fly rather high/far away...

 

Although the one I use is a bit fancier (but about the same price); in addition to the alarm buzzer, it also has an LCD display on it that shows total pack voltage as well as cycles through the voltage of each individual cell.  Pretty nifty, and really handy for quickly determining the charge state of a random battery while in the field.

 

http://www.amazon.com/dp/B003Y6E6IE/?tag=otakunocast-20

[G+_Wayne Black]

I'm not familiar with that radio, but doesn't the FlySky T6 monitor battery voltage? Or do you need a special monitor in the quad?

(trying to learn all angles of this sport)

Per Bangood: "pilots can clearly monitor flight data such as battery voltage, altitude, temperature, GPS, etc."

I have a Devo F12E and it starts to vibrate when the battery get to a pre set voltage. I've bumped it up to 21.7 from the default, to give me a little more time to get it landed safely.

A little hard to get used to when the quad is 30 meters in the air and you're hoping you can get it down before the voltage cutoff! Really gets the adrenalin flowing!

[G+_Donald Burr]

Wayne Hobbins I think he's talking about monitoring the voltage of his quadcopter's battery pack.  The T6 does indeed have a voltage meter on it.  Some quads/flight controllers have voltage monitoring built-in, for example, the KK2.1 board has it, but requires that you bring out an extra connection from your battery, e.g. off of a power distribution board, or splice directly into the battery connector if you don't use a power distribution board.  However many flight controllers don't have built-in voltage monitoring and so require the use of an external voltage monitor/alarm device as discussed here.