Hi, I am having issues with my Z3. I first noticed it yesterday. I work outside and it's been chilly lately, about 4 degrees Celsius. Anyway I left my phone in a cold wheelhouse of a boat for about 2 hours. I came back to use it and I noticed that my screen was ghosting ( leaving segments of the previous screen), upon seeing this I restarted my phone. My phone restarted, my battery said it was at 27% and then immediately it told me my battery was at 0% and started shutting down. I plugged my phone in, whilst turned off, and it started charging at 25%. I charged it to 35%, which took ages, then turned it on whilst still connected to a power supply. It stayed on and slowly charged. I wasn't able to give it a full charge but I got it to 72%. I monitored my phone on my way home and the charge level never dropped below 72%, and that was with me using it. When I got home I looked at the battery usage graph and it had flat lined at 72%. So once again I restarted my phone, upon restart it told me my battery was at 86% and with use, it discharged normally. I charged my phone over night and it was at 100% by the morning. I went to work and it seemed OK, until I left it in the wheelhouse again whilst I was working. I came back to use it and again, the screen was ghosting and the battery had frozen on a percentage. After a 30 seconds of me swiping the screen left and right the ghosting stopped. But the battery was telling me the same percentage so I checked the graph and it had flat lined again. It seems like when I am using it, it's fine. But if I leave it for more than half an hour or so the battery percentage freezes and I need to restart to find out how much battery I really have. I have had the phone for roughly 16 months and I still have 8 months of warranty left. I am running on Android 6.0.1
Do I need a new battery? Or is this a software issue that can be repaired by myself?
