Checking battery level for those Bluetooth connected devices isn’t exactly complicated, but it does take a few clicks for each one. Open System Preferences, click Bluetooth, view the Bluetooth devices connected to your Mac.
Unfortunately, Apple doesn’t make it easy to see exactly how much battery power is left on each device. Hey, Apple. Percentages would be nice. Minutes, too. Or, you can click Show Bluetooth in Menubar and another few clicks will tell you the percentage of battery power remaining on each device.
Or, simply add the free utility BatteryAlert to your Mac.
Much to my surprise, BatteryAlert is a Dock-based app so it doesn’t clutter up the Mac’s already overcrowded Menubar. In the Dock BatteryAlert displays the remaining battery charge for the device with the least amount of power.
Click on BatteryAlert and you’re greeted with battery status for each connected device– mouse, trackpad, keyboard– and options for alerts. You can receive notifications when the battery level of any device reaches a certain threshold– email, Messages, Notifications, or Alerts.
Nicely done, simple to setup and use, and it’s free. Apple should do this in OS X (the only caveat is that you need OS X Yosemite).