FLD-02 new upgrade firmware V2.1 is available. It fixed a small bug of FAS-100 FrSky Ampere Sensor data display, and replaced W by AH.

Link: http://www.frsky-rc.com/download.asp?id=22

File names: "How-to_FLD-02 upgrade"  and "FLD-02 Upgrade ROM_V2.1"