This is all very helpful, thankyou. I left my PW5 Signature edition in sleep mode for about six months having charged fully, and it only lost about 25% of its battery. This, compared to 17% on the Clara BW after two weeks. Whatever the mechanism is, there's obviously something that works differently between the devices. Anyway, I've set the BW to power off after 60 minutes of non-use, and will also check the automatic sync feature. At least I now know the BW is behaving normally.
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