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Shimano Di2 SM-BTR1 Battery 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.
Since 2009 Shimano Di2 has been at the forefront of the electronic shifting revolution. The BM-DN100 Battery Mount comes with a short mount for frames
Shimano Ew-Sd50 Battery Mount
Shimano Shimano BATTERY CHARGER FOR SM-BTR1 EXT BATTERY, W/O PWR CABLE - REV Endurance Sports
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Shimano Dura-Ace Di2 SM-BTR1 Lithium Battery
Compatibility: Shimano Di2 SM-BTR1 battery Recommended Use: road cycling Manufacturer Warranty: 2 years
SHIMANO Di2 BATTERY MOUNT BATTERY MOUNT
Shimano Di2 SM-BTR1 Battery for External Mount - bike-components
Shimano Dura-Ace SM-BTR1 Battery: Keeps you supplied with power in all weather conditions. The 7.4V, high performance Lithium Ion battery is designed
Shimano Dura-Ace SM-BTR1 Di2 Battery
Shimano SM-BTR1 Di2 External Battery
For Shimano DI2 Compatible SM-BCR1 SM-BTR1 External Battery
For Shimano Di2 External Battery Charger SM-BCR1 SM-BTR1 7970 6770 - AliExpress
Shimano Di2 SM-BMR1 Base B Unit Y7F398050
Shimano SM-BTR1 Di2 External Battery - Performance Bicycle
Y7E098010 Original Shimano parts guarantee that all components work perfectly for optimum performance and maximum safety and longevity.
Shimano Dura-Ace Di2 EW-7972 Base B & Bolts - M3 x 6mm - Y7E098010
SHIMANO Battery Charger
Shimano Di2 Batteries. Must purchase battery, charger, and power cable to complete the system. All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions. Di2 External Battery, battery charger, and power cable are universal between Dura-Ace 9070, 7970, Ultegra 6870, 6770 and Alfine Di2 systems. Battery weighs 71g.
Shimano SM-BTR1 Di2 External Battery