I’ve had my q15’s 7 years now. They use aaa batteries and I use rechargeable batteries. I used a set of two for 4 years, now on the second set. Replaced the cup

I’ve had my q15’s 7 years now. They use aaa batteries and I use rechargeable batteries. I used a set of two for 4 years, now on the second set. Replaced the cups for 50usd, but now the head band is going... I hope to replace them.