Find Battery Health and Maximum Capacity
On a MacBook Air or Pro, choose Apple menu → System Settings → Battery and look for Battery Health. Depending on the macOS version, an information button may reveal Maximum Capacity. An older Mac or release may lack this control; that absence does not prove the battery is healthy or faulty.
Normal means macOS considers the battery to be working normally. Service Recommended means its ability to hold charge is lower than when new or it is not functioning normally. Apple says you can continue using it and consider service if reduced runtime affects you. This guide summarizes Apple documentation; we have not measured a particular MacBook's battery life.
- Record the exact Mac model and macOS version.
- Open System Settings → Battery and note Battery Health and any visible Maximum Capacity.
- Compare actual runtime under similar brightness, networking, and workload rather than one partial charge.
Find cycle count and check your model's limit
Hold Option while opening the Apple menu, choose System Information, then select Hardware → Power. Cycle Count appears under Battery Information. One cycle is a cumulative full battery's worth of use; it need not happen in a single discharge or a single day.
Apple's maximum cycle count varies by exact model: some older MacBooks have limits of 300 or 500, while many newer models list 1,000. Check the official model table rather than assuming all MacBooks share one limit. A battery can still work after reaching it, though runtime may decline. Read the health message and usable runtime alongside the count.
Swipe the table sideways to see every column →
| Reading | What it means | Common mistake |
|---|---|---|
| Cycle Count | Cumulative full charge cycles used | Counting every charger connection as a cycle |
| Maximum Capacity | Estimated capacity compared with a new battery | Confusing it with charge remaining now |
| Service Recommended | Capacity is lower or the battery is not working normally | Assuming immediate failure or automatic free replacement |
Charging stops near 80%: first check the charge controls
If the menu bar shows charging paused near 80%, inspect Optimized Battery Charging and any Charge Limit configured in Battery settings. Apple says optimized charging may delay charging beyond 80%, while a supported Mac with a configured limit charges near that setting. When you need a full battery for travel, use Charge to Full Now from the battery status menu.
The charge limit, current charge percentage, and Maximum Capacity are three different measures. If charging still stops unexpectedly with the optimization settings off, also check temperature, adapter, and charging status. Do not buy a replacement battery or run an unverified calibration script solely because the current charge reads 80%.
- Check whether the displayed percentage is charge remaining or Maximum Capacity.
- Inspect Battery settings for Optimized Battery Charging and Charge Limit.
- Use Charge to Full Now if needed; investigate a persistent charging fault separately.
When to ask Apple about service
Bring the exact model, Battery Health message, Maximum Capacity if available, Cycle Count, and real runtime symptoms to Apple or an authorized provider. Apple describes a normal battery as designed to retain up to 80% of original capacity at its model's maximum cycle count under normal conditions. That design reference does not promise a free replacement for every Mac reading 80%; eligibility and cost depend on the device and service assessment.
Stop charging or using a battery that is swollen, deformed, unusually hot, or producing an unusual smell, and seek professional help. Do not open or puncture it yourself. If Battery Health is Normal and charging simply pauses at a configured limit, check the settings before treating it as a service case.
- Back up important data and confirm the last successful backup.
- Save the exact health message, cycle count, and repeatable runtime symptom.
- Check coverage, inspection results, and price through Apple's service process; verify device and data afterward.