Are there any battery changes with the preview?

[Yuiiski]

To the people that already have the Windows Phone 10 preview, have you noticed any change in your battery for the worse?

 

[ssapre]

On my 635 - other way. I noted it better than 8.1 with same apps running in background.

 

[mjyumping]

we'll see more user opinions once the new preview is released