ORIGINAL: CGRetired
One other fact to point out is that LiFe packs have a very flat discharge curve with a very sharp knee at the point of exhaustion. This means that the voltage remains fairly constant throughout the discharge process of that pack. For this very reason, devices such as Voltwatch2 and such devices can give you a false sense of security with regard to remaining charge in an LiFe pack. So, use these devices carefully and monitor your flight times.
CGr.
Absolutely.
I've seen posts here from people who INSIST that voltage can be used to determine the charge state of LiPo's, LiFE's, A123's and other Polymer batteries.
Unfortunately that doesn't really work, because of the relatively flat discharge curves.