Charge Stop

Charge Stop manages your laptop's battery charge threshold — the percentage above which charging stops. Keeping it below 100% extends battery lifespan for laptops that spend most of their time plugged in.

## Quick start (CLI)

The command-line tool is the primary way to use Charge Stop:

$ charge-stop # show the current threshold

$ charge-stop 65 # stop charging at 65%

$ charge-stop history day # render battery activity as a chart

Run charge-stop history to see how your laptop has been used over time. Plug-in, unplug, and charge cycles are rendered as color-coded terminal charts for the current day (default), week (history week), or month (history month). Try it:

$ charge-stop history

## How it works

A root daemon (charge-stopd) manages the sysfs battery attribute directly and persists the setting so it survives reboots and suspend. Firmware on many laptops resets the threshold across these events, but the daemon re-applies the persisted value automatically (including after resume).

The CLI talks to the daemon over a UNIX domain socket using a small REST API:

• GET /v1/threshold report the current threshold
• POST /v1/threshold set and persist the threshold
• POST /v1/restore re-apply the persisted threshold
• GET /v1/events retrieve battery event history

## Snap interfaces (strict confinement)

The daemon uses the power-control interface to manage sysfs battery attributes. Connect it manually before use:

$ sudo snap connect charge-stop:power-control