![]() Using SleepStudy to possibly find the cause behind sleep drain: ![]() This will make your Surface turn off WiFi in sleep, but it only takes a few seconds for it to return when turning on from sleep. Once the command is run, just go into power plan settings and disable it for plugged in and on battery. I highly recommend doing this since it will save power and prevent network activity in sleep. However, the main issues that cause sleep drain are usually faulty drivers.ĭisabling network connectivity while in Standby: This option is no longer available in settings but it can be added with some commands. Disabling WiFi in standby can help save a lot of power, as well as checking SleepStudy for any drivers acting up. We can, however, make an attempt to fix this. ![]() For a successful sleep session with minimal battery drain, you want it to be in DRIPS as much as possible. Problem is the computer is basically still turned on, so fans may continue running and driver issues can prevent DRIPS from occurring (basically the deepest sleep, with no CPU code being run). ![]() Main advantages include instant-on like a phone, network access while in standby for checking email, updates, etc. Information on Modern/Connected Standby: Pretty much all Surfaces use S0 sleep, aka Modern/Connected standby. A good capacity would be greater than 80%, and a good number of cycles would probably be under 300, but it is possible to have a battery with a lot of cycles that still has good capacity. For example, on my Asus ZenBook, If I divide those numbers, 58,429 mWh / 63,004 mWh = 92.7% battery capacity. To find your capacity percent of the battery, divide the Full Charge Capacity by the Design Capacity. Then look at the Installed Batteries section. \battery-report.html to open it in a browser. Just run powercfg /batteryreport, then run. This way, for example you could leave the computer on overnight and it would still be instantly on in the morning if less than 10% is drained.Ĭhecking Battery Capacity: It's a good idea to check the capacity of your battery, so if it draining like crazy, you can rule out the battery if it is in good shape. So in this case standby would work until 10% has drained, then it will hibernate. Powercfg /setdcvalueindex scheme_current sub_presence standbybudgetpercent 10 If you want to change the budget you can open PowerShell as admin and run So if your sleep drain is terrible or just average, and it drains 5 percent within a hour, your Surface will be turned off when you return in a hour or two, which is obviously quite annoying. Hibernate Budget: This is a feature that after 5 percent (the default on my SP4) has drained in standby, it will shut off and hibernate. I discovered that the battery often drained 5 percent, then Windows went into hibernate since the budget was exceeded.Īll Commands in code: Run in PowerShell as Admin My SP4 was going into hibernate pretty quickly when I put it to sleep, which often was a pain when coming back after an hour. (If there are any image issues let me know I am not the best with reddit markdown)īackground: A few days ago I discovered the SleepStudy feature on Windows to track the performance of Modern (connected) Standby. I also wanted to go over some battery-saving info that I've learned, that can be applied to all Surfaces. I want to explain how YOU can fix it on your own Surface since it was very unclear on what was causing it. I think I just fixed the 5% per hour sleep drain on my new-to-me SP4.
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