Rechargable Batteries Oticon OPN1

Hi I use the rechargable batteries (Gold Colour) that came with my aids along with the Oticon charger
Has anyone researched better longer lasting batteries than those supplied?

Is there a standard among HA mfrs. when it comes to rechargeables? I doubt it. It’s probably like cell phones - no 2 are same shape/size.

I have no experience with rechargeable batteries. How long to they last? I get on average, 5-6 days out of a pair of Ray-o-vac batteries in my Oticon OPN1’s. I have a smart watch that I have to recharge daily. I find it to be a pain.

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