Yesterday my brand new TCL 10 Plus ran out battery so I plugged it in. I went to get myself some water and when I came back I saw that my phone somehow charged itself up to 56 percent! In minutes! I used it with that charge and it used 25 percent in 25 minutes then turned off at 20 percent. I factory reset it and everything seems OK for now. Could you guys tell me why would something like this happen?