DD-Lab

Battery Stress Timer

Browser-based battery stress timer with animated display load, local JavaScript workload and MySQL heartbeat logging.

Detecting browser and device…

Balanced CPU + display stress

No Load, just timer Timer only with animated background, battery telemetry and server logging. No CPU workload.
Light Low CPU bursts, mostly display/timer test
Medium Balanced CPU + display stress
High Heavier CPU workload
Recommended test conditions
Chrome or Chromium Battery on 100% Fullscreen Same brightness Unplugged Close other tabs Close other apps

This test intentionally stresses the browser and may drain your battery.