macOS · Mac · Everyday fixes

Keep your Mac battery healthy

Lithium batteries age from heat and from sitting at full charge. macOS has one setting that quietly slows both down.

DifficultyEasy
Time5 min
RiskLow
ReversibleYes
PlatformmacOS
UpdatedAug 18, 2026

Written and tested by emdottech

What that means

Low risk. This fix only checks things, or changes settings you can switch back in the same place. This change is reversible — you can return to the previous state without professional help or data loss.

A battery with the twenty to eighty percent charge zone highlighted as the sweet spot, and optimised battery charging switched on

Steps

01
- System Settings → Battery → make sure Optimised Battery Charging is on — it learns your routine and holds below 100% until you usually unplug
02
- Check health any time:System SettingsBatteryBattery Health— 'Normal' with a good max capacity means you're fine
03
- Avoid sustained heat: no duvets, no direct sun while charging; a hot MacBook is an ageing battery
04
- Apple Silicon Macs handle charge cycles well — if the battery's health drops below ~80%, that's the point to consider service

How to verify the fix

Optimised Battery Charging is on, and Battery Health shows Normal with a good maximum capacity.

If this didn't fix it

Health drops below about 80% max capacity — consider Apple service; no setting will reverse that ageing.

Next stop: the related fixes below, or start a guided diagnosis.

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Keep your Mac battery healthy

Steps

✓How to verify the fix

!If this didn't fix it

Related fixes

How to verify the fix

If this didn't fix it