Battery Drains while laptop is off

[rafiqur-rahman]

Yesterday I charged my laptop to 100% in the night, shutdown it, and then leave it the charger unplugged, but after 10 hours when I turn it back the battery level was showing 86%! I wonder how the battery drained so quickly overnight /in just 10 hours while the laptop is shut down?! What is the possible reason and solution for this, please?

I think the condition of the battery is pretty good as I get around 4 hours plus backup time during regular uses but this "after shutdown draining issue" is not something normal right?

This is the battery status:

[WAWood · Accepted solution]

@rafiqur-rahman 

Win10 has enabled a new hibernation process known as Fast Startup -- which is enabled BY DEFAULT. This is different from Fast Boot, which is a BIOS/UEFI option.

Fast Startup is supposed to dramatically speed up the booting process, but in some PCs, it actually slows it down or causes it to hang. It's also a new form of hibernation known as hybrid sleep -- and this causes battery drain to maintain the state of the PC while turned off. In some rare cases, it can also cause a laptop to overheat because the processor is still running and still generating heat, as this has been reported when the laptop was turned off and put inside a case.

Disabling Fast Startup might fix booting and shutdown problems.

There are two ways to disable FastStartup in Win10: (1) through the Control Panel, and (2) through an elevated command prompt.

Control Panel - Open Control Panel --> Power Options.
Select "Choose what the power buttons do"
Select "Change settings that are currently unavailable"
At the bottom of the Window, under Shutdown settings, uncheck the box regarding fast startup

Elevated command prompt - run the following command:
REG ADD "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Power" /V HiberbootEnabled /T REG_dWORD /D 0 /F

In both cases, reboot Windows.

NOW, Fast Startup is disabled.

See if that helps.