Magic Battery - Get the battery percentage of your Apple Magic devices (Keyboard, Trackpad)

magbat.js

// npm install ioreg --save
const ioreg = require('ioreg')

async function getExternalDevicesBatteryPercent() {
  const devices = await ioreg('AppleDeviceManagementHIDEventService')
  const externalDevices = devices.filter(device => !!device['BatteryPercent'])
  return externalDevices.map(device => ([ device['Product'], device['BatteryPercent'] ]))
}

async function main() {
  const batteryLevels = await getExternalDevicesBatteryPercent()
  
  batteryLevels.forEach((batteryLevel) => {
    console.log(batteryLevel[1] + '% - ' + batteryLevel[0])
  })
}

main()