Hi guys, just an update on my problem where I was getting very low capacity and fast battery drain. I called Xperia support and they directed me to factory reset my phone. I did protest this at first as I hadn't installed any new firmware or apps and I wasn't sure how it could affect the battery health test anyway, but I went ahead and did it. Lo and behold, my capacity was restored! I am now checking it every day and it is falling, though I am not sure if the rate is usual or not. My battery could still be faulty, I will have to wait and see.