{"product_id":"shimano-di2-rear-derailleur-battery-bt-dn320","title":"Shimano Di2 Rear Derailleur Battery BT-DN320","description":"The BT-DN300 gives me the same compact fit as my old battery but with updated wiring options. I’m keeping things clean and tucked away while adding wired backup—exactly what I want for a modern 12-speed Di2 setup.\u003cbr\u003e\n\u003cbr\u003e\nThe Shimano BT-DN300 Built-In Di2 Battery brings next-generation compatibility and clean aesthetics to your electronic drivetrain. Matching the slim form of the BT-DN110, it tucks discreetly into a frame or seatpost while powering both front and rear derailleurs with stable 7.4V output.\u003cbr\u003e\n\u003cbr\u003e\nEquipped with three SD300 ports, the DN300 is designed to support Shimano’s latest 12-speed Di2 platforms, including the R9250, R8150, R7150, and RX825 series. Whether running a semi-wireless cockpit or a fully wired system, this battery adapts with seamless integration. For riders prioritizing system redundancy, the third port adds wired backup capability without altering setup.\u003cbr\u003e\n\u003cbr\u003e\nWeighing just 52g and compatible with Shimano’s E-TUBE PROJECT software for firmware updates, the DN300 offers a lightweight, future-proof solution for precision shifting across road and gravel disciplines.","brand":"Shimano","offers":[{"title":"Default Title","offer_id":43127335387234,"sku":null,"price":55.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/9695\/9330\/files\/Shimano-Di2-Rear-Derailleur-Battery-BT-DN320.jpg?v=1784322266","url":"https:\/\/www.twohubs.com\/products\/shimano-di2-rear-derailleur-battery-bt-dn320","provider":"twohubs cycling boutique","version":"1.0","type":"link"}