I do whole 5 day trips with it, without charging, but I don’t have it tracking and turn it on and off a lot. I’ve done it that way for years so hard to say as far as total length.
I’m headed out tomorrow so will set it on 10min tracking and leave it on all day, then comment back. To me the battery life is great but like I said, rarely so I just leave the thing on all the time.
To follow up, I dropped 2% over 4 hours off of peak charge today while hiking, paired to my phone. I’d conservatively estimate about 20% per day if it’s just on? That’s about what I’ve seen in the past the few times I just keep it on.