Shimano Di2 Battery SM-BTR1
The Di2 Dura-Ace system utilizes a lightweight(69 grams) lithium-ion battery to power all the systems. On a full charge the battery will last approximately 1000 miles and recharging takes a short 1.5 hours. Charger and wiring kit sold separately.
Note - To complete the Di2 System all items listed below are required.
To maximize the performance and utilize Di2 to its fullest potential it
is very highly recommended all other components(cranks/brakes/ect.) be Shimano Dura-Ace
7900 series.Di2 Dura-Ace Controls or
(Di2 Dura-Ace TT/Tri Brake Lever
& Di2 Dura-Ace TT/Tri Bar-End Shifters)Di2 Dura-Ace Rear DerailleurDi2 Dura-Ace Front DerailleurDi2 Dura-Ace Rear Wire kitDi2 Dura-Ace Front Wire KitDi2 Dura-Ace Battery ChargerDi2 Dura-Ace Charger Cable
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