The power house of Shimano Di2 is a long-life 7.4V Li-Ion battery that is both compact and reliable, taking shifting effort away from you.

Features

• Excellent sealing and reliability have been proven through repeated field tests in various riding conditions, including extreme temperatures, rain, mud, and cobble stone roads
• Using a hard wired battery system which is both light weight and accurate compared to current wireless technology (as a wireless system would require 4 batteries: one for the RD, one for the FD, and one for each shift lever)
• The use of a single small and discreet internal battery is light weight, efficient and creates a robust and reliable system
• One charge can give between 1000 and 2000 kilometre range depending on conditions and front mech operation (as this is the main power drain)
• 500 times rechargeable life
• Internal chip enables system wireless functionality of Bluetooth components
• Battery is to be mounted with seatpost or frame/fork manufactures hardware normally inside the seatpost or seat tube/fork steerer
• Reliable and secure water resistant E-tube terminals connection
• Charging is done via stem junction or handlebar display
• Battery weight is 50 grams