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MBPのバッテリー劣化をコマンドで確認する

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概要

Mac book proのバッテリーの劣化具合をコマンドで確認するメモ。

  1. ioreg コマンドでバッテリー情報を取得できる
  2. DesignCapacityが出荷時の容量(mAh)
  3. MaxCapacityが現在の容量(mAh)
  4. MaxCapacityDesignCapacityで割ると劣化具合がわかる。
(以下の環境で確認した)
$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.12.6
BuildVersion:   16G1036

コマンド

DesignCapacity=$(ioreg -c AppleSmartBattery | grep DesignCapacity | awk '{print $NF}')
MaxCapacity=$(ioreg -c AppleSmartBattery | grep MaxCapacity | awk '{print $NF}')
echo "MaxCapacity: "$MaxCapacity
echo "DesignCapacity: "$DesignCapacity
echo -n "AttritionRate: " && echo "scale=3; (${MaxCapacity}/${DesignCapacity}) * 100" | bc 
(結果)
MaxCapacity: 6133
DesignCapacity: 6559
AttritionRate: 93.500
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