See the session, not just the remaining charge
A battery percentage in the morning is an outcome. To understand it, look at the time spent asleep, recorded wake activity and charge change together. WattGuard reads the macOS power log and turns its events into a sleep history you can inspect.
Normal wake and background wake are different events. Repeated background wakes can be worth investigating, but a wake label does not identify an app as the proven cause of all lost charge.
Compare against your own Mac
A universal overnight-loss threshold cannot describe every Mac, battery and routine. WattGuard builds a personal baseline from prior completed battery-powered sleep sessions and compares recent drain and background wake activity with it.
The baseline uses the median of three to fourteen prior sessions. With too little history, there is less context; it is not a benchmark against other users or a prediction of battery lifetime.
Turn a suspected cause into a controlled comparison
Choose one reversible change: quit an audio app, disconnect an accessory or adjust a supported setting. Mark a problem sleep, then compare the next session. Similar duration, power source and connected devices make the comparison more informative.
The follow-up comparison can show an estimated improvement. It cannot prove the same change will work on every Mac or reverse battery wear.
- Inspect recorded sleep blockers.
- Read wake reasons as clues for a test.
- Recheck after changing one condition.
Get started without changing hidden settings
You can begin with Activity Monitor and the power log before configuring any automation. WattGuard makes that investigation easier to revisit. The application is being prepared for release on macOS 14 and later; final download details are on the release page.