I use it to track storage voltage. But may be really loud in public wars.
Works flawlessly. I double side taped it inside my Rc car and on my rc heli frame. No more ruining batteries!
Has lasted me a while under quite a bit of use
Bought this along with my first lipo battery. Unfortunately the battery is pretty big and the voltage alarm won't fit, but it works great regardless. A very essential product to have.
Does exactly what it should do. The display is an added bonus. You'll need some space for this in the battery compartment, but overall it's excellent.