After a failed Stapedectomy, I lost complete hearing in one ear. My hearing aid provider recommended the L50 and then CROS L. He suggested the 50 because I have almost perfect hearing in my other ear. Is it worth going to 70 or even better to go to the Infirio series (because they battery life issue on L, and the fact that I can hear well in the other ear)? Besides the Phonak, is there a better option? (Since I’m 20 years old, you understand that battery life and bluetooth are something I definitely want 
).