apple watch电池健康
为什么apple watch 更新watch os9后电池健康提高？
Apple Watch
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参考 Apple Developer Documentation
After updating to watchOS 9, your Apple Watch Series 4 or Series 5 will recalibrate and then estimate its maximum battery capacity more accurately. (93206868)
翻译一下：在更新 watchOS 9 后，Apple Watch Series 4 或 Series 5 会更准确地重新校准然后重新预估最大电池容量。