In my case half the reason I got it was for the TV. Even with the hearing aids, there was enough ambient sound in the room with fans and kids and whatnot that I couldn’t understand the speech in the program, especially when the actors had accents. I had resorted to using headphones all the time for TV listening before I got the BT HA’s.
I got the Marvel M70-R’s recently. They have BT, other wireless streaming protocols (for Phonak accessories) and a rechargeable battery, though the same model is available with 312 primary cells. I get excellent battery life even with all the wireless use.
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I use BT on the phone all day for phone calls. I usually make a half dozen calls a day, some of the lengthy.
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I use the Phonak AirStream protocol TV Connector device to stream audio from the TV. I stream 3-6 hrs of TV in the evening while I’m working on home projects.
Even with all this wireless use I’ve never run the batteries down, even when I fall asleep with them in and wake up at 5am. I pop them in the charger (low but still running) and pull them back out at 8 when I leave and I’m good for another day.
The wireless connectivity was the whole reason I upgraded and paid so much for these. All the major manufacturers have BT but only in certain models. The Costco KS9’s are identical to my Phonaks, I hear, but cheaper. ( Wish I had known that! )
So all in all, if you’re a wireless headphone or headset user, or if you’ve had that need and just haven’t gotten around to getting the devices, I would go with a BT model. It’s very convenient to get that ability functionality automatically in your hearing aids, always with you.