LiPo users what LVC or warning system ?

[miniGranis]

What LVC's or other "warning items" for discharging LiPo's are you guys using.
I know of Mike's LI-Saver but almost every other LVC are airplane stuff, that if I have understood it correct, will throw my car in reverse when voltage drops.
I tried LI-Saver but that fried on me and before ordering another one I'd like to know what my options are.

So please help me with choosing a good LVC or similar, if possible one that can deal with 2S => 4S would be sweet.