Why does my battery start draining at 3 AM?

[Windows Central Question]

My battery starts draining at 3 AM.

I have a Nokia Lumia 730 Dual SIM, everything is fine, but for several days now the battery starts draining each night at 3 AM. I can see this on a battery app. Is there an app that starts doing some stuff at 3 AM exactly? Until now this was not happening, and no new apps were installed in month... Thanks!

 

[stenson625]

Re: My battery starts draining at 3 AM.

Check system update time and see if you have set it to update around 3.00am.