Headphone case battery drain?

Obeisance

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Oct 11, 2023
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Hey,
I have a pair of Urbanista Lisbon earbuds that I use pretty much daily.

I'm finding that the case bleeds battery charge while the headphones stay at 100%. For a few days I thought I was imagining it.
I changed them for five hours yesterday, full charge.
Checked this morning, case is now flat.

I think this has been happening since I got a replacement phone - a Google 7A.

Is there any weird connection settings that could be draining my battery? Like is the USB constantly synching or something?

Some help would be appreciated!

Thankyou