How To Manage Slack Background Activity [Solved]

Immediate Fix: Disable Background App Refresh

The fastest way to stop Slack from draining your battery is to restrict its ability to sync data when the app isn’t active. On mobile devices, this prevents constant polling for new messages.

Disabling these features ensures that Slack only consumes significant power when you are actively reading or typing. You will still receive high-priority push notifications via the OS-level gateway.

Technical Explanation: Why Slack Drains Battery

Slack is built on the Electron framework, which essentially means every workspace you open runs a separate instance of the Chromium browser. This architecture is resource-heavy because it requires dedicated CPU and RAM for each process.

Background activity occurs because Slack maintains a WebSocket connection to stay updated in real-time. If your connection is unstable, the app will constantly attempt to reconnect, causing “CPU spikes” that drain your battery rapidly.

Alternative Methods to Reduce Activity

Method 2: Disable Hardware Acceleration

Hardware acceleration offloads visual rendering to your GPU. While this sounds efficient, it often prevents the GPU from entering a low-power state, leading to faster battery depletion on laptops.

To disable this on desktop, navigate to Preferences > Advanced and uncheck “Use hardware acceleration when available.” Restart the app for the changes to take effect.

Method 3: Managing Active Workspaces via Terminal

If Slack becomes unresponsive or consumes 100% of a CPU core, you may need to force a clean restart. Using the command line ensures all hidden background “helper” processes are terminated.

# For macOS users to kill all Slack-related background processes
pkill -9 Slack

# For Linux users to check background resource usage
top -p $(pgrep slack | head -1)

Limiting the number of signed-in workspaces also helps. Each additional workspace adds multiple background threads that compete for system resources and battery life.