Why is my battery life draining so fast with Windows 10 ( what can be done to correct this issue)?

[RonKunda]

Why is my battery life draining so fast with Windows 10 ( what can be done to correct this issue)

Since installing Windows 10 my lap top battery drains very fast and sometimes goes from 30/40 % to shut down in minutes

 

[Chintan Gohel]

Since installing Windows 10 my lap top battery drains very fast and sometimes goes from 30/40 % to shut down in minutes

go to settings and check under system > battery > apps or programs that can run in background and disable those not needed
also check under task manager what is enabled at startup and disable unnecessary programs
check which apps are syncing always and disable those not needed
reduce syncing times such that the app checks fewer times
switch off wifi/cellular when not needed
check your brightness levels, are they more than enough?
check battery setting, is it high performance or normal or battery saver

Also, allow apps to update while on charge as there could be many apps still updating after doing the windows 10 upgrade