Last night it was almost out of battery so I left it plugged in and charging. Sometimes it switches between charging/not charging because the cable doesn't fit snugly and if I move too much. However, when I went to sleep it was definitely charging. This morning, I woke up and the phone was dead, but I didn't really think anything of it; I only plugged it in to charge again later in the day. However, after leaving it plugged in for a couple of hours, I realized that it hadn't charged at all. I tried turning it on but that didn't work; soft and hard resets haven't either; the screen's just stayed black the whole time. This has never really happened before, but it has had problems turning on/charging in the past.