My rog 5s phone automatically shuts off when it's under 15 %. Does my phone battery have a problem?

Please tell us some basic information before asking for help:
- Model Name:Rog 5s
- Firmware Version:
- Rooted or not:not
- Frequency of Occurrence: it has happened 3 times now and it's been only a week since I've bought it.
- 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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Comments
@rStar I was getting a tiny bit envious of the s series but no more
If it's within return window, you should consider returning it
S is for slightly better. Don't let performance benchmark fool you bro.
His problem can be fixed with battery calibration. There are many threads regarding that process.
Recalibrate your battery works
Step1: go to "Settings" > "Battery" > "Battery Care"> "Select charging limit"> "Move bar to 100%" , and turn on "steady charging" n choose "ultra steady"
Step2:Plug in AC charger to charge battery to 100%
Step3:Normal use until capacity of battery decrease to 0%
Step4:Do Step 2 again to charge battery to 100 %
@Gene Lloyd Hopefully your issue can be solved by calibrating your battery. Follow the instructions given by @k_huat above and let me know how it goes.