Hello, Engineers! Today's update is another minor one bringing you more improvements before next major update. The battery exploit was removed, so welding your batteries back up no longer resets its powerstate without trashing the powercells. You are welcome.
And if the wait for another major update seems long to you, why not join our Physics & Engineering Contest meanwhile? Check the details at Marek's blog post: http://blog.marekrosa.org/2017/11/space-engineers-physics-engineering.html
Full list of bugfixes and improvements: https://forum.keenswh.com/threads/7399033