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不使用第三方工具查看笔记本的电量还剩多少
source link: https://www.lujun9972.win/blog/2018/08/14/%E4%B8%8D%E4%BD%BF%E7%94%A8%E7%AC%AC%E4%B8%89%E6%96%B9%E5%B7%A5%E5%85%B7%E6%9F%A5%E7%9C%8B%E7%AC%94%E8%AE%B0%E6%9C%AC%E7%9A%84%E7%94%B5%E9%87%8F%E8%BF%98%E5%89%A9%E5%A4%9A%E5%B0%91/index.html
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不使用第三方工具查看笔记本的电量还剩多少
电池电量信息，通常的方式是内核通过sysfs导出信息和控制接口.
这个接口是平台不相关的，因此我们可以通过查看 /sys/class/power_supply/ 下内容的方式来查看电池相关信息，比如
比如，下面命令可以查到电池的剩余容量为97%
cat /sys/class/power_supply/BAT0/capacity
97
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