The big improvement W10M build 10586.36 is battery saver.

[chaitanyabiswas4]

In latest build have good battery saving option.

 

[RUCKUS_US]

The battery in this build is good by itself before you even need battery saver

 

[dicks-webos]

Battery is indeed very good with this latest build - getting longer runtime with this than I had with 8.1.

 

[RUCKUS_US]

I'm quite impressed with the windows 10 mobile at this point. Most people have a lot of complaints but all new things have some wrinkles they need to have ironed out