Information
This policy setting manages whether or not Windows is allowed to use standby states when putting the computer in a sleep state.
If you enable this policy setting, Windows uses standby states to put the computer in a sleep state.
If you disable or do not configure this policy setting, the only sleep state a computer may enter is hibernate.
Solution
Policy Path: System\Power Management\Sleep Settings
Policy Setting Name: Allow standby states (S1-S3) when sleeping (on battery)