I just bought a used JR Reciver and TX that shows a digital voltage meter. I was wondering what is a safe range, and what is the lowest voltage you would fly with.. Thanks

It'll beep at 9.0 or below I think. I wouldn't fly under that for sure. I would probably stop at 9.5 just to be safe (I always used to).

I have a Lipo battery now, and fully charged is close to 12.4-6 volts. Haven't seen ill effects yet. The battery will last a very long time before it gets to around 9 volts. I used to charge my crappy 600mah pack literally after every 3-4 flights.

didn't see the part about receiver. I would get a voltwatch for the plane and that will tell you how much your Rx battery pack is still packin. It has a lightbar that will say safe at one end and low at the other. Once you get halfway down I'd probably charge the Rx pack.

You didn't say WHICH JR you have... however almost all of them with the LCD display have a built in low voltage warning.

The low voltage warning is a series of beeps UNLIKE the ones used for the plane timers ( you know about the plane flight timers, and TX "on" time timer too don't you? )

Typically you can fly until the low voltage warning kicks in, at which point you have a 2-4 minutes to land your plane before the voltage levels get too low.

The 7+ channel TX's also have a little "notch" on the LCD voltage scale that indicates where this is expected to happen, so you can gauge how much time you have left.

I usually replace the TX battery with something more heafty... e.g. 1800mAh or above, and then I'm able to fly all day long w/o worrying about the TX's battery level.

R.T.F.M. [sm=drowning.gif]

What does the manual suggest?

Most TX battery packs are 8-cell, 9.6volt packs. When they're fully charged, they'll show lots more than 9.6volts. After awhile they'll show right around 9.6volts. They'll show that for quite awhile. When they're about to run out of juice, they'll show 9.5 and below, and it'll be dropping.

Most RX battery packs are 4-cell, 4.8volt packs. Same as above except the voltages are around the 4.8 number.

You need to get an ESV for your flight packs. This is something you really should do. You need to learn to maintain your equipment as much or a little more than you need to learn to fly it.

Anything you question or that bothers you, just ask.