Roh phone 2

Please tell us some basic information before asking for help:

1. Model Name: Rog Phone 2
2. Firmware Version:
3. Rooted or not: not
4. Frequency of Occurrence: 4th time in this month
5. APP Name & APP Version (If your issue relates to the app):

In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.

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While I was using my mobile it suddenly blacked out. Nothing worked. I tried up key+down key+power key and various combinations. Nothing worked. Battery was around 50% before it turned off. Then I googled for various ways to turn on my device. One of the comment showed that the device charging red light was blinking instead of complete charging & after keeping it that way it started charging, after charging it till 3% it started. So I did the same. It took around 15 minutes to get to 1% then it started charging normally and it started after pressing power button.