Depends on the form factor and what functions are active.

I'd say 4-6-8 is low-average-high duration for the standard form factor and ANC will reduce the duration by 25-30%

10 hours is exceptionally high, i don't think i even seen that claim

But year, they don't even have ANC, they are just a good pair of buds, the 10h claim is good.

Pro tip:

You know that a pair of buds is good if they offer Multipoint. It is such a hard feature to find in the mid and low end market

> But year, they don't even have ANC, they are just a good pair of buds, the 10h claim is good.

Are you talking about the ones I linked to? They clearly have ANC, and Wirecutter claims it's among the better ANCs they've tested.

> 10 hours is exceptionally high, i don't think i even seen that claim

The claim is right there in the product description. Wirecutter also confirmed it with a test:

https://www.nytimes.com/wirecutter/reviews/best-wireless-ear...

They do say it can be reduced depending on how you use it.

Finally, here's a snippet of an Amazon review:

> I just played 7 hours of continous music with the noise canceling activated at high volumes and there's still almost 30 percent battery avaliable.

And another:

> I used the earbuds for 8 hours between ANC & transparency mode, ... Considering how often I use the earbuds after 8-10 hrs per day and 4-5 days of use from a full charge, the battery life is still 2 lights remaining.

One review does state lower life with ANC:

> But, a full charge only lasts me 6 hrs with anc on auto and volume at 50% or less.

A few reviews talk about even lower battery life, but given Wirecutter's tests and the preponderance of those who get long battery lifes, I'll assume the exceptions are defective products.

In any case, is ANC even relevant for hearing aids? I would have thought ANC would be a hindrance.

(In general, several reviews refer to using it continuously for their work shift).

The one thing that may not be particularly good is the mic.

Edit: Here is someone who tested with ANC on. They got 7hr 55 min:

https://www.soundguys.com/anker-soundcore-space-a40-review-8...

Landfill isn't so bad though. Segregating identical waste into one place is a fine approach, because once it becomes possible to recover it, now you know where it is. Think of it as a mine. (It's a problem if it leaks into the groundwater of course.)

But lithium is not at all rare so it's not going to be hard to make more batteries.

Is there a way of setting an audiogram? That's basically a frequency response curve for your hearing, so it's the basic requirement for acting as a hearing aid. This is a setting which iPhones have for Airpods (as far as I know, you can't set it without an iPhone).

Yes. It's called HearID

https://www.soundcore.com/hearid