Ultra using battery fast

Ever since new update my ultra v1 only last around 20 hours. Almost half of what I got before. Battery health is 88% Tried hard reset and unpair with backup afterwards. Picky thing i haven't tried is unpair without restoring backup It's been a week since last unpair to make sure it was done reindexing. Don't know what to do. It is slowly becoming useless for me now.