Cell Standby at 50% is not too high. Your battery manager shows total battery usage, and all equal 100%. High cell standby means low values of every thing else.
My cell standby is 38%, and overall battery is at 70%. It has been off the charger for 12h27m53s. Bluetooth & GPS are always on, and hotspot has been running for the last 30 min.
Have you checked your mobile network settings to
make sure that it is CDMA only?
Battery life on my XPRT has been outstanding, compared to my EVO4G.