10-27-2016 07:39 PM
I have received my new X260 laptop a month ago (also my first Lenovo), I did a fresh install of Windows 10 Pro and a bunch of drivers. It has been working well until now.
Two days ago, I used it all-day with original adaptor plugged in. At the end of the day, I unplugged it and close the lid to put it to Sleep mode before I left work. The day after, I came to work and found my X260 battery was at 5%. I thought I have mistakenly set the Power Option so I checked and it was set to Sleep when I close the lid.
Yesterday, I did the same, put it to Sleep before leaving work, but this time I clicked Start > Power icon > Sleep to make sure it entered Sleep mode and I watched the red LED on the lid blink slowly.
Today I came to work and the battery was at 5% again!
I am suspecting that X260 woke up at some point during the night. I don't know how, no cables connected.
Please guide me if I need to update any driver or check any settings on Windows/BIOS.
10-31-2016 07:16 AM - edited 10-31-2016 07:16 AM
Look through Event Viewer -> Windows Logs -> System to determine whether the system is unexpectedly coming out of sleep mode. If so, see if there are any clues about why this is happening.