Sona is a great performing hearing aid, with some very well designed features. It does use a #13 battery while many newer model hearing aids have gone to rechargeable technology. Personally I have worn hearing aids for over twenty years and I do not find batteries difficult to change. A #13 battery is also large enough to last a good length of time before requiring a new battery. I tend to forget to plug in rechargeable devices. These Sona hearing aids are easy to set up with the smartphone app, volume changes via smartphone can easily be applied anywhere. Design is very good, as is the build quality. I particularly like the fact that the battery compartment need only be cracked open to shut off the Sona. Comfort is very good, I forget that I have them on! Noise and feedback are well controlled, and sound is crisp and clear. I have moderate hearing loss and on other hearing aids that I have owned I could obtain adequate volume levels only by using closed dome ear pieces. These Soma aids came set up with the "Magic" hybrid type domes which so far seem to be giving me enough volume while remaining very comfortable. These are the best hearing aids that I have owned to date and I am satisfied.
