Battery Health Center

Battery Health Center brings everything about your laptop battery together
in one native GNOME app, much like the Battery settings on macOS.

Overview
- Charge level, status and time remaining (until empty, or until your charge limit)
- Live power draw in watts
- A quick health summary: maximum capacity, condition and cycle count
- Recommendations, such as limiting charging when you're always plugged in,
or that an app is draining your battery

Battery health
- Maximum capacity compared with when the battery was new
- Condition: Normal, Worn or Service Recommended
- Full-charge and design capacity in Wh, and how much capacity has been lost
- Charge cycle count
- How capacity has changed over the last 30 days
- Voltage, average power draw, manufacturer, model, chemistry and serial number

Charge limit
Lithium batteries wear faster when kept at 100%. If your laptop is plugged in
most of the time, limiting the charge to about 80% can noticeably extend the
battery's lifespan. Set where charging stops and where it resumes, and keep
the limit after restarts and sleep.

Usage and energy
- Battery level history for the last 24 hours or 7 days
- Apps using significant energy right now, and their average impact,
with estimated power draw while on battery
- Optionally keeps recording history in the background after you log in

Permissions
This snap is strictly confined. After installing, connect these interfaces:

 sudo snap connect battery-health-center:hardware-observe

 sudo snap connect battery-health-center:system-observe

 sudo snap connect battery-health-center:power-control

hardware-observe reads battery information, system-observe sees which apps
use energy, and power-control changes the charge limit. The app shows which
ones are missing.

Compatibility
Battery information works on any laptop with a standard Linux battery driver.
Charge limits need firmware support exposed by the kernel as
chargestartthreshold / chargestopthreshold, as on ThinkPads and many
other laptops.

Linux doesn't measure power per app, so app energy usage is an estimate
based on CPU time.