This is the slickest product we've come across in a while! It is the Quanum wireless battery monitor. It uses 2.4ghz low power TX to send battery voltage of your flight pack to a receiver which you can mount on your transmitter. Perfect for those who don't want the hassle or expense of a full OSD telemetry system.... and it can be used in any aircraft in your fleet from your park foamie to your 800 class AP heli.

It will read out via a large 132x64 pixel LCD screen individual cell voltage as well as total pack voltage. From 1-6 cells. The receiver will also give an audible alert as 3.0v/cell approaches. This is also a perfect device for checking the condition of each cell of your packs while in flight and under load.

The TX is 16 grams. Very light weight. It plugs directly into your battery balance tap. It does not interfere with 2.4ghz video or Aircraft control systems. CE and FCC approved. Range is very respectable.... listed as 1 kilometer, although I haven't had the guts to actually put that to the test.

Separate TX can be bought for each aircraft. The RX has an internal lithium battery and is charged via USB connection.