http://eagletreesystems.com/MicroPower/micro.htm
You want the eLogger v3, I'd personally go for the 150A version with wire leads rather than Deans (I'm going to convert to EC5 connectors though). The 100 amp version is cheaper but we pull some serious peak amps through these things and the 100A will not be nearly as accurate at higher amperages (it will read 100+ but not accurately). The motor and ESC in your Flux are going to pull some serious burst amps, definitely over 100. I also believe that 20C 3400 mAH packs are a bit too small for use in the Flux but I am really interested in seeing how they hold up under the load of your Savvy, if they hold their own I have found myself some new lipos for my boats
