Microsoft is still having hard times with Surface Pro 3’s battery drain issues. A while ago, the company released an update that fixed battery drain issues for Surface Pro 3 users with LG batteries, but the same update caused battery charging issues with the Simplo batteries.
Surface Pro 3 with Simplo batteries are more common, meaning more users are experiencing the battery drain issues. Microsoft has now issued another firmware update that will hopefully fix the battery drain issues for all Surface Pro 3 models. The update can be installed by going to Start > Settings > Update & security > Windows update > Check for Updates.
The only good thing is that the issue of affected tablets hasn’t damaged the batteries in any way.