Before you start, this is tricky. You need to know why. Then you will find it easy.

You need to get into place

• seatpost
• Di2 cable
• Di2 battery
• and seatpost lock.

At least 3 hands needed, but most probably you have only 2 hands, right?

This is the seatpost lock. Whatever you do, while working with seatpost, Di2 cable and Di2 battery - the seatpost lock will fall into the seat tube.

So I have prepared the setup for you.

When unpacking the frame you will find all like this.

1 = Di2 battery, with cables attached, packed, for safety and for holding the seatpost lock

2 = tape, holds seatpost lock, when battery is out of seat tube

3 = tape, holds seatpost lock, when tape (number 2) is out to get seatpost in

is important to follow step by step:

Take out the packed Di2 battery from the seat tube.
Make sure tape number 2 stays in place

unpack the Di2 battery
you can see the cables are already connected

put Di2 battery inside seatpost
it will hold firmly inside the seatpost with the already mounted piece

put seatpost (battery inside) on a stable place

put the seatpost into the seat tube
make sure the two mounted Di2 cables go all the way down the seat tube (with the seatpost), not tangled in the seatpost lock

take off tape number 3

now you can tighten the seatpost lock with the allen key