Mac Repair Center
Battery & Performance
Health Check
A 30-second browser test that measures how your Mac's CPU performs under sustained load — a reliable indicator of battery degradation and thermal throttling. No download needed.
🔋 Battery status
Reads your current charge %, whether you're plugged in, and estimated time remaining — directly from the browser API.
⚡ Throttle detection
Runs a 30-second CPU workload and plots performance over time. A drop below 85% of the baseline signals throttling from battery or heat.
Before you start
Keep this tab in the foreground for the full 30 seconds — browsers throttle background tabs which would skew the result. Close other heavy apps (video calls, large downloads) to isolate your Mac's true performance.
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