So I've had my 950XL for about nine months now, and in the last few weeks it's developed the whole random reboots issue. At first only when the battery got below 30%, but now it can do so when it's as high as 50%. Sometimes it just shuts off abruptly and takes a while to restart; and on one occasion it's turned itself back on a while after I've turned it off. Usually it just goes straight to black, but occasionally there's a flash of green.
In the last day or so, I've started getting interference on the screen - like, flickering horizontal bars in a slightly brighter or darker (not sure which) version of the same colour. I had been planning on getting a new battery, but I'm not sure whether, given this new development, it's actually a battery issue or something wrong with the phone itself. Any advice?