I'm pretty disappointed with battery life. In particular, I've noticed that my battery life is a LOT less recently.
I've got an SP5 / 2017, Core i5 machine that I use basically as a desktop replacement (pretty much permanently charging on the docking station). Purchased sometime in Feb 2017.
I just went through the battery re calibration process outlined in a Windows Central article.
I'm at 75% battery.
Design capacity is 45,000 mWh. My unit is giving me 33,000.
And today's battery life estimate is 2 hours, 30 minutes down from 3 hours, 40 minutes.
In day to day use, if I take it off the dock, it feels like a race ... can I get done my tasks before my battery dies. I can see the battery levels dropping so quickly and am constantly setting screen brightness to lower and battery performance slider to the left. Feels very disappointing.
E-waste is a huge problem and I do believe manufacturers absolutely must make their products repairable, up-gradable, etc.
Another disappointment is the fact that MS released a patch to help some older models of Surface prolong battery life (when used primarily plugged into a dock/charger). Why hasn't this patch been released for the latest models of Surface, too?