No battery was not the core reason. I wanted Edge AI to win during my selection process but I found sphere to be superior in speech in quite and noise. It also received superior technical scoring to support my conclusions. I felt the autosense’s changing of the gears (programs) was right on target in most situations but I did not get the same experience with Edge AI because there is no way to no know on the spot which gear it was operating in. Any way, I have given detailed reviews for both devices. For my detailed review of Sphere go to My experience wth Starkey Edge AI and comparison with my Phonak Sphere trial and for my detailed review of Edge AI and comparison of both devices, go to My experience wth Starkey Edge AI and comparison with my Phonak Sphere trial
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