Forum Discussion
Surface Pro 12 battery drains when shut down
Because the charge drops after an explicit shutdown and Wi-Fi works only after a second boot, the remaining evidence points beyond ordinary sleep settings—possibly firmware, a device power-state problem, or hardware leakage. Before service, install Surface firmware and driver updates, including optional Windows updates, then run Surface Diagnostic Toolkit. Generate powercfg /systempowerreport and /sleepstudy; confirm whether the interval is Shutdown rather than Modern Standby. Record the battery percentage, run shutdown /s /f /t 0, disconnect USB devices and the keyboard, wait 24 hours, and record it again. Repeat once with Wi-Fi disabled in UEFI. If drain persists while the report shows S5 shutdown, Windows applications are not running and another reset is unlikely to help. Save both reports and test results for support. The Wi-Fi failure after cold boot strengthens the case for firmware or hardware servicing, so accept the engineering inspection rather than changing more registry or power settings.
So I sent it away Jamony and it looks like they did nothing at all - this could be a major issue with the way you can log a ticket but more on that later - I attached all the paperwork including this thread. I feel it was ignored. The issue still exists. What I noticed is that the issue doesn't happen when the keyboard is detached. I hadn't removed it before and when I sent the device away I was told not to send the keyboard. The keyboard acts as a cover too so I shouldn't need to detach it. Any thoughts? Is there something different I should do. Also how can I complain that the team didn't do anything! Just sent my device back and removed the screen cover that I'd put on it.
Many thanks for your reply. The device is being shipped back to Microsoft. Really infuriating that this hasn't worked since day 1 and as you say, something related to shutdown or hardware. I already generated the system power report and sleep study. There was nothing anomolous there. Let's hope that my device comes back in one piece or that I get a new device that looks new. Am miffed that Microsoft don't replace new for nearly new and that I have to buy another screen protector! The policies are so antiquated and unfair (and too hard!)
