Shimano BT-DN300 Di2 Internal Mount Battery

The new DN300 battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12-speed road derailleurs and shifters (if a fully wired option is selected). With the same size as its predecessor, the slim DN300 battery can be housed inside seat posts or frames ensuring a clean aesthetic. Now with 3 ports, the DN300 simplifies wiring to front and rear derailleurs, supplying stable power at all times. The third port is for riders who seek the redundancy of Shimano's 12-speed Di2 wired option.

• 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
• The use of a single small and discreet internal battery is light weight, efficient and creates a robust and reliable system
• One charge gives a 1000 kilometre range depending on conditions and front mech operation (as this is the main power drain)
• 500 times rechargeable life
• 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 SD300 E-tube terminals connection
• Charging is done via stem junction or handlebar display
• Battery weight is 50 grams