What's nice about Voltwatch2 is that it gets plugged into a vacant channel on the RX or Y cabled to share a channel. Because it is connected to the receiver and "see's" the voltatge as the receiver would see it, well, it's a loaded measaurement and you get the reaction on the LED's as the receiver see's the voltage.

So, if you use it, when you turn on your RX, and move the TX sticks, the current draw shows a direct relationship to voltage that Voltwatch2 sees, and you get immediate feedback as to battery condition. It has several green LED's, followed by a couple yellow LED's and a red LED. Moving the sticks will cause a draw and the LED's will flicker down a bit, depending on how the battery deals with the load. It's a great way to track binding linkage, by the way.

Anyway, if you get a flicker into the red, well, it may indicate a problem or just that you need to charge the battery.

It's a great way to monitor your voltage "on the fly" and keeps the warm-and-fuzzy's around.

CGr.