This page has moved to [Installation guides > Check and replace your Di2 Wireless shifter batteries](/installation-guide/check-di2-shifter-battery-level-and-replace-it/). You should be redirected automatically, but please click the link if that doesn't happen.

Check your Di2 battery level and replace it

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Shimano 12-speed wireless Di2 shifter batteries last about two years, and this page will teach you how to check the battery level and replace the battery itself.

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Learn how to install Di2 components and accessories using these simple installation guides. Install derailleurs, junctions, bike wiring, D-fly / Wireless modules and more. 