Shimano Di2 External Battery SM-BTR1

Regular Price
$104.99
Sale Price
$104.99
Regular Price
$104.99
Not Available
Unit Price
translation missing: en.general.accessibility.unit_price_separator 

Shimano's Di2 SM-BTR1 Battery is their external power source. It works with all versions of Di2, provided you have a SM-BMR2 Battery Mount to attach the battery to the system. Battery life depends on many factors. It's not only the number of times you shift, but the climatic conditions, and how often you use the front derailleur, as it takes more energy per shift.