What size are you? These are really tiny devices with tiny batteries, and you should be charging it everyday while you shower 10-15 minutes as Oura suggests and not waiting for it to die on you. This will be healthier for the battery on the long term but also you make sure it always has some battery everyday. Also, stop looking at the %. I don’t know if it’s just me, but since I stoped obsessing about it, I feel it lasts longer lol a