I first started a long trial with the rechargeable Lumity RICs. The battery life was much less than advertised by Phonak, where I would get roughly 18 hours of use. I sometimes have shifts that go overnight or need to keep functioning with hearing for more than 18 hours. I have profound hearing loss and can’t afford to sit in silence and wait for the battery to recharge when I need to be out in the field. I also hated being tied to a charger, with no alternatives if I ever forgot it.
I got the 312 Lumity BTEs at the end of November. I track every time I change the batteries, and I have made it at least 14 days before needing to replace the batteries every single time. I also love that I always have extra batteries in my wallet, car, and laptop bag in case the hearing aids die; I can always get the aids working again in a minute or less.
The BTEs with disposable batteries are much larger, but the 2 weeks of use is completely worth it! I listen to bluetooth every day, usually for several hours, and still get 14 days per battery.