The battery calibration tool for your MacBook®

Mac OS® 10.11 El Capitan or later

Works on any MacBook® model

Retina® display ready

FREE upgrade for all Watts 1 users


$ 5,99
Try Watts 2 for 30 days
$ 5,99 (non Mac App Store version)


The battery needs to be calibrated from time to time to keep the onscreen battery time and percent display accurate, and to keep the battery operating at maximum efficiency.

Better battery information

Watts can substitute the default menu bar battery icon and adds advanced features.

Customizable menu bar icon

Watts looks similar to the Mac OS® battery icon menu, and provides some extra options like vertical battery icon and more.

Battery charge

Watts gives the usual information of the power source used, current battery charge and remaining time.

Battery capacity

Watts provides detailed information on the battery capacity and charge cycles. It also stores your battery data regularly, so you can check its evolution during time.

Battery health

Watts summarizes several battery indicators and gives you a clear overall status of your MacBook® battery.

Battery calibration

Watts features an intuitive calibration assistant. It will guide you through the process of calibrating your battery. The calibration scheduling can be adjusted for your needs, and even postponed if you want. Calibration dates are automatically logged.


  Watts provides detailed in-app help, everything is clearly explained

  System notifications are used to guide you through the calibration process

  System notifications can be enabled to notify desired battery charge levels 

  System notifications can be enabled to notify AC power plugged or unplugged

  System notifications can be enabled to improve MacBook® usage and extend battery life


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