No, you can't get that. Not clear how it would be implemented anyway, as the fully charged voltage and voltage decay curve both vary depending on what kind of battery you have. I know of people using LiPO's, LiFE, NiMH and NiCd, and people probably use alkaline batteries when they start out. All the Tx can sense is the voltage level, and it knows how much is required to safe files - so those are the things it tells you about.
Do not ask me questions via PM. Ask in the forums, where I'll answer if I can.
My remotely piloted vehicle ("drone") is a yacht.
