Shimano Steps EC-E8004 - External mount type

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 External mount type
BT-E6010 / BT-E8010 / BT-E8014 / BT-E8016
1. Insert the key.
Press the power switch to turn the power OFF, and then insert the key into the key cylinder on the battery mount.
Power switch
Power switch
Key
Key cylinder
BT-E8010 / BT-E8014 / BT-E8016
BT-E6010
2. Release the battery lock.
Turn the key until you feel it make contact.
3. Remove the battery.