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When should you replace your MacBook battery?

Updated June 2026 · 4 min read

Replace your MacBook battery when its maximum capacity falls below about 80%, macOS shows “Service Recommended,” it can no longer get you through your day, or it shuts down unexpectedly. A cycle count near 1000 supports the decision. If the battery is swollen, stop using the Mac and get it serviced right away.

A MacBook battery is a consumable — it’s designed to wear out. The question is just whena replacement is worth it. Watch for these signs.

The clear signals

  • “Service Recommended” in System Settings → Battery.
  • Maximum capacity below ~80% — runtime is noticeably shorter.
  • It won’t last your day the way it used to.
  • Unexpected shutdowns, even with charge remaining.
  • Swelling — a bulging case or trackpad. Stop and get it serviced now.

Cycle count as a supporting sign

A cycle count near the 1000 rating, combined with low capacity, reinforces that the battery is genuinely worn rather than just having a bad day.

Replacement options

Apple offers battery service for every model (see Apple’s support page for pricing), and reputable third-party shops are often cheaper. A replacement resets both the cycle count and the maximum-capacity reading.

Squeeze more life out first

If you’re close but not there, you can slow the decline: limit charging, keep it cool, and extend its lifespan. Mac 4 Breakfast’s health forecast estimates how long you’ve got.

Frequently asked questions

Is it worth replacing a MacBook battery?

Often yes — a fresh battery restores full runtime for far less than a new Mac, provided the rest of the machine still meets your needs.

How much does a MacBook battery replacement cost?

It varies by model and whether you use Apple or a third party. Check Apple’s battery service page for your exact model; out-of-warranty Apple replacements typically run roughly $130–250.

My MacBook battery is swollen — what should I do?

Stop using and charging it immediately and take it for service. A swelling battery is a safety issue, not something to wait on.

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