The new DN300 Built-In type 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).

– Compatible with thinner next-generation electric wire SD300 and systems after R9250/R8150 series
– Li-Ion type
– Capacity: 500 mAH |3.7Wh ( 2000km autonomy)
– Rated voltage: 7.4V
– Charges through RD-R9250 |RD-R8150 rear derailleur using EW-EC300 Di2 Charging Cable (sold separately)
– Fixing small parts included
– Weight: 52g