Shimano Di2 - Charging, shifting and setup made simple

Charging your Di2 groupset 

To charge your Di2 system, plug the Shimano charging cable into the front junction box with the cable pointing upwards. A blue light confirms it’s charging.

Handlebar shifters use button cell batteries (usually CR1632). These don’t need charging and will typically last 2–3 years. Just replace them when the time comes.

How to shift gears with Di2 

Di2 makes gear changes fast, accurate and almost effortless.

Right-hand shifter (rear derailleur)

• Press the small inner button (closest to the bar) to shift into a harder gear (smaller sprocket)

• Press the large outer button to shift into an easier gear (larger sprocket)

Left-hand shifter (front derailleur)

• Small inner button: move to the small chainring

• Large outer button: move to the big chainring

How to check Di2 battery levels 

For shifters
Hold both shift buttons down. An LED near the top of the lever will light up:

• Green = good

• Red = low battery

For the main system battery
Press the function button on the front junction box. Watch the LED:

• Solid green = 100%

• Flashing green = 50%

• Red = charge soon

• Flashing red = low

How to use the Shimano E-TUBE app 

The E-TUBE Project app gives you full control over your Di2 setup. From shift customisation to firmware updates, it's your go-to tool for keeping your bike dialled. 

E-TUBE | Shimano Road

Extra features for Ultegra & Dura-Ace Di2 

Got Ultegra or Dura-Ace Di2? You’ll see extra buttons on top of each shifter. These can be set up to control shifting or accessories.

To customise:

1. Open the E-TUBE app

2. Select your bike and then a shifter

3. Choose what each top button does — for example, shifting up or down the cassette

Need help?

If you're unsure about anything Di2-related, give us a shout. We’re always here to help you get the most from your ride.