How long can Miband Last?

From my first charge until now, it can last for 47 days and I still have 1% battery left.

Below is my screenshot of my phone's MI FIT App:

I used basic with silent alarm at the beginning then grow into Phone alert. Wearing it 24 hours x 7 days a week for 47 days !!! Some might think I'm crazy.. but I found it very useful.

So now, I modify the MI BAND's feature to the below: