Rapid Battery Health Degradation on MacBook Pro (Less Than 1 Year Old, 302 Cycles)

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I’m currently experiencing a concerning battery issue on my MacBook Pro and wanted to share it here in case others are facing something similar or if it’s possibly tied to a software-level behavior.

Device & Software Info: • MacBook Pro 14” (2023) • macOS 26.0(25A5316i) • Battery Cycle Count: 307 • Battery Health: 91% (as of today) • Condition: Normal

Issue: • Battery health has dropped from 96% to 91% in less than a week. • For the last week each day, the maximum capacity seems to decline by 1%, even when usage is light and the Mac is plugged in most of the time with Battery Health Management enabled. • When the battery drops below 10%, it drains extremely fast — the percentage decreases nearly second by second, which doesn’t feel normal.

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darkpaw OP

1w

Have you raised a Feedback report? If not, please do so at https://feedbackassistant.apple.com/ then post the FB number here.

Then, if it's concerning you, downgrade to macOS Sequoia 15.5 and restore from a backup (from before you installed macOS 26) and see whether the battery drain continues. If it does, then it's your hardware and you should get it checked out under warranty. If it doesn't happen then it's likely a bug in macOS 26, and you'll have rides the feedback report already.

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