Battery health is not the same as battery life
MacBooks are known for long battery life, but over time performance drops as the battery ages. If your MacBook drains quickly, charges inconsistently, or shuts down unexpectedly, it may be time for service.
The battery health status in macOS is a useful clue. If it is below a healthy range, the machine may still work, but the overall reliability is reduced.
Common signs it needs replacement
Very short runtime, a battery that swells, heat spikes during charging, or sudden power drops are all warning signs. If these appear, replacing the battery is safer than continuing to work on an unstable power system.
What to do before replacement
Back up your files, check battery health, and confirm the charging-related issue is not caused by the charger or board. This helps you avoid replacing a battery when a charging circuit or power issue is the real cause.
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