I've not been entirely too happy with the battery life of the 950 in the few days that I've owned this phone. I find myself running out of juice around the end of my work day, and have to charge it to get through the night. My "old" 1020 had similar battery life, but that was with a nearly 3 year old phone!
I've turned off Hello and now Hey Cortana, to see if it helps...I'll have to try it out.
Also, I should mention that you can't find a USB type 3 cable in any retail locations in my area. It's nuts! I just ordered a bunch off Amazon, but wonder how much the cable will make a difference in how fast the phone will charge. But maybe this topic is for another thread.