11% for me over 10 days on a 6s with 89% battery health & NHS app.
%-age over the short hour-chunks metric kinda depends how much I use the phone though. If I rinse the battery with lots of other apps, exposures will be a small % relative. If I barly touch my phone the battery will last loads longer, but exposures will account for a higher percentage of it.
It's 7% over the last 24 hours. Breaking it into little chunks it's 33% of one hour I did nothing with my phone. But only 2% during my lunch hour when I was cycling and Komoot+permanently on screen (using 98%) rinsed over half my battery til the phone died. So it's not like 33% means it used 33% of my battery. Just 33% of the very few mAh my phone used during that time, or 2% of the lots of mAh it used in that other window.
So yeah, it's definitely taking a chunk out my battery overall, but the "percentage" can be misleading short-term, and is only 7%-11% of total battery over 24hrs or 10 days. But I guess that's the price I pay to be scanning far more often for nearby devices. Hard for Apple to do much I guess, can't beat the physics that using a battery to generate RF power and communicate with stuff far more often is inherently unavoidable, other than tell you to buy a new phone with bigger battery and lower power consumption.
Is your 33% over a short or long period, and how much are you using other apps and stuff? If your phone is mostly idle then it'll be a big user percentage-wise, if you're using your phone a lot and it still counts for 33% then I guess omething sounds wrong, or you're having a massive lockdown disco with hundreds of people exchanging data! :)
Since there's a lockdown at the mo, I'm half tempted to turn it off unless going to the shops or somewhere with untraceable people. Unfortuantely that deletes the logs though, so if I have been exposed I guess I don't find out if the logs are gone? Or does it still work with the logs cleared and only needs them temporarily?