See what drains the battery while the laptop is "asleep" — via Microsoft Learn

Commandlow riskNeeds adminWindows 11Windows 10

On Modern Standby laptops, the Sleep Study report shows each standby session over the last few days, how much battery it used and which components kept the system busy. Great for diagnosing a laptop that's hot or empty after a night in the bag.

Takes effect right away

Command

Run in an administrator Command Prompt / Terminal window.

powercfg /sleepstudy /output "%USERPROFILE%\Desktop\sleepstudy.html"
rem Look further back, e.g. 7 days:
powercfg /sleepstudy /duration 7 /output "%USERPROFILE%\Desktop\sleepstudy.html"

Undo

del "%USERPROFILE%\Desktop\sleepstudy.html"
Only meaningful on PCs that use Modern Standby (check with powercfg /a). The report is a local HTML file; nothing is uploaded.

Sources

Source reviewed
2026-11-02
Link checked
2026-11-02
Tested hands-on
Not by Oddbyte.Me

Oddbyte.Me hasn't tried this on every Windows build, so keep the undo handy.

sleep studymodern standbybattery drainpowercfgreport

More in Performance & Power

Check memory pressure, not 'free RAM' — via Apple Support

Tricklow risk

A Mac that shows almost no free memory is usually fine: macOS keeps recently used files cached in RAM so apps reopen faster. The number that matters is the Memory Pressure graph in Activity Monitor, which combines free memory, swap and cached files.