Please tell us some basic information before asking for help:
Model Name: Asus ZenFone 5
Firmware Version: UL-ASUS_X00QD-ASUS-16.0615.2006.131-1.1.41
Rooted or not: not
Frequency of Occurrence: constant
APP Name & APP Version (If your issue relates to the app): I factory resetted and redownloaded the firmware above.
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.
I charged the phone overnight. The phone worked the next day but at a faster battery discharging rate. I was able to recharge the phone for awhile before it turned off then refused to boot up. The phone boots up to the logo bouncing animation then it turns off. The battery is fine and is charged up to 86% and the charging function is still intact. I attached a video clip for reference. Thanks a lot!