For those experiencing higher than normal battery drain during sleep - this is caused by the Marvell Wi-Fi driver not optimized properly. Unfortunately we're stuck until MS releases a firmware fix.
In the meantime - if you shutdown your Wi-Fi before putting the Surface 3 to sleep, the battery drain is significantly reduced. To facilitate this, follow these steps:
1) Create two BAT files somewhere on your C: drive (you can use Notepad to create it)
a) Call the first one "disablewifi.bat" and put this command in it: netsh interface set interface name="Wi-Fi" admin=disabled
b) Call the second one "enablewifi.bat" and put this command in it: netsh interface set interface name="Wi-Fi" admin=enable
2) Open "This PC" and in the address bar, type: start menu
3) Go into the Programs folder
4) Create two new shortcuts - the first to disablewifi.bat and the second to enablewifi.bat
5) Edit their properties and change their icons to something more appropriate (I used the red stop sign and red check mark)
6) On the Shortcut tab for both, click "Advanced", and check the box to run as administrator.
7) Now - click Start and All Apps - find your new Enable and Disable shortcuts there - pin them to Start
Before you're ready to put your Surface 3 to sleep - click the Disable tile on your Start screen. Then put the S3 to sleep.
When you wake it back up - click the Enable tile to turn WiFi back on.
Hopefully this helps some people until MS releases a more permanent fix.
In the meantime - if you shutdown your Wi-Fi before putting the Surface 3 to sleep, the battery drain is significantly reduced. To facilitate this, follow these steps:
1) Create two BAT files somewhere on your C: drive (you can use Notepad to create it)
a) Call the first one "disablewifi.bat" and put this command in it: netsh interface set interface name="Wi-Fi" admin=disabled
b) Call the second one "enablewifi.bat" and put this command in it: netsh interface set interface name="Wi-Fi" admin=enable
2) Open "This PC" and in the address bar, type: start menu
3) Go into the Programs folder
4) Create two new shortcuts - the first to disablewifi.bat and the second to enablewifi.bat
5) Edit their properties and change their icons to something more appropriate (I used the red stop sign and red check mark)
6) On the Shortcut tab for both, click "Advanced", and check the box to run as administrator.
7) Now - click Start and All Apps - find your new Enable and Disable shortcuts there - pin them to Start
Before you're ready to put your Surface 3 to sleep - click the Disable tile on your Start screen. Then put the S3 to sleep.
When you wake it back up - click the Enable tile to turn WiFi back on.
Hopefully this helps some people until MS releases a more permanent fix.
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