SM-BTR1 Di2 external mount battery

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
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 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
Optional battery mount adapter is available if standard mount is not compatible
Reliable and secure water resistant terminals
Easily removable for charging
Battery weight is 68 grams

battery

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