Cheat Sheet: 12-speed battery checks

Published January 1, 2022 by BetterShifting Terry, Last updated November 7, 2022

To check a shift lever battery, press-and-hold both buttons on that shift lever for 0.5 seconds or more.

Shift lever battery check

The LED on the shift lever will then indicate the battery status.

Shift lever battery status

  • Green: 11% to 100% battery
  • Red: 1% to 10% battery level
  • No LED: 0%

If your shifter LED turns red, you have about a month to go before it’ll go completely flat - buy a new CR1632 (Amazon | eBay) and replace that battery as soon as possible.

Here is more information on checking and changing wireless shift lever batteries.

Check 12-speed main system battery status

To check the 12-speed main battery charge, press the button on the rear derailleur for 0.5 seconds or less.

Check 12-speed Di2 main battery charge

BetterShifting Terry

About the Author - BetterShifting Terry

I enjoy playing with bike tech - both bike building and wheel building, bike maintenance and of course, Di2. Besides writing content and working on the technical side of BetterShifting, I also work as a Software Developer in The Netherlands. Read more on the About this site page.

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