Test your Chromebook Battery

As another school year comes to a close, many schools are packing up their Chromebooks for a 3rd, 4th or even 5th year.  These older Chromebooks are likely (or will soon start) experiencing battery issues.  This is a great time to check their battery health in preparation for next school year.  Here’s how (there’s also a GIF at the bottom of the post):

  1. Close all open tabs.
  2. Open Crosh (Chrome OS Developer Shell) using Ctrl+Alt+T
  3. Type “battery_test 30” and press enter.
  4. The first number that reads out is your battery’s health (from 0-100%).  The higher it is, the better.  As a general rule of thumb, if it’s over 50% on an older Chromebook, you’re in pretty good shape.
  5. After 30 seconds (the number you typed in above) you’ll see how fast your Chromebook is discharging.  You could’ve typed in a smaller number to make it go faster, but the test may not have been as reliable.  If it’s discharging at a rate of more than 0.10% in 30 seconds, you may have issues in the future.

Of course, a weak or rapidly discharging battery is not a big deal if the device can be plugged in throughout the day.  But if you’re in a 1-to-1 school where students carry Chromebooks from class to class, a battery that is under 50% health and discharging faster than 0.10% in 30 seconds won’t make it through the day.

Chromebook Battery Test Animation

Published by

Jake Miller

Jake is a Google for Education Certified Trainer and is the Lead Technology Integration Specialist for Brady Middle School in Ohio's Orange City Schools. In the past he taught STEM, Science & Math in Stow-Munroe Falls, Ohio, where he was also a leader in the district's Technology Leadership Team and a co-advisor for the middle school's STEM Club. He has been an educator since 2003. His Bachelor's Degree is in middle-level education (math/science) from the University of Akron and his Master's Degree is in Instructional Technology from Kent State University. He has enjoyed providing more than 100 professional development opportunities at conferences and school districts across the state of Ohio. He is very involved in Twitter (@JakeMillerTech) and provides regular pointers for educators with his #GAFETip tweets.