Use Crosh to test battery health

Use the steps in this section to evaluate the health of the Chromebook battery, and check the discharge rate.

Disconnect the charging cable from the Chromebook.
Power on the Chromebook and sign in to your account.
Close any open apps or tabs and reduce the screen brightness to the lowest level.
Open the Chrome browser and type chrome://extensions/ in the omnibox (browser address bar), and then press enter.

The Extensions window opens.
Remove the check marks next to Enabled to disable all of the extensions.
Press the ctrl + alt + t keys to open crosh.

Crosh opens in a new browser tab.
Type battery_test 1 into crosh, and then press enter.