Originally Posted by
Steve B.
Is this a button mounted on a battery that itself is mounted inside your seat tube ?, and do you then need to remove the seat post as well as battery ?.
The battery/junction is located on the underside of the stem. The maintenance button is located on the bottom of that box. Press and hold until it turns red, and you're in maintenance mode. Then use the rear derailleur buttons to move the derailleur one way or the other.