My series 0 Apple Watch battery life was horrendous lately after updating to 3.1.1 before Apple pulling the update my battery would drain and be dead by 5 pm which isn't normal it was great before the update. Then I updated it to 3.1.3 and the battery was still bad so contacted Apple and I sent them my watch and within a few days they sent me a replacement guessing it's refurbished Apple Watch for free, because I had Apple care so now loving my watch again! 
