--- product_id: 441470536 title: "SHIMANO Bt-Dn300 Battery Black, One Size | bike-shifters-and-parts" brand: "shimano" price: "$359.03" currency: USD in_stock: true category: "Shimano" url: https://www.desertcart.us/products/441470536-shimano-bt-dn300-battery-black-one-size-bike-shifters-parts store_origin: US region: United States of America --- # 500mAh long-lasting charge 59g ultra-lightweight power Seamless wireless Di2 integration SHIMANO Bt-Dn300 Battery Black, One Size | bike-shifters-and-parts **Brand:** shimano **Price:** $359.03 **Availability:** ✅ In Stock ## Summary > 🔋 Power your ride with stealth and stamina—upgrade to the future of shifting! ## Quick Answers - **What is this?** SHIMANO Bt-Dn300 Battery Black, One Size | bike-shifters-and-parts by shimano - **How much does it cost?** $359.03 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/441470536-shimano-bt-dn300-battery-black-one-size-bike-shifters-parts) ## Best For - shimano enthusiasts ## Why This Product - Trusted shimano brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Precision:** Effortless seat tube installation with a sleek, low-profile design. - • **Next-Gen Wireless Sync:** Optimized for Shimano’s 12-speed Di2 systems, ensuring flawless shifting. - • **Race-Ready Reliability:** Consistent voltage output guarantees smooth, lightning-fast gear changes. - • **Featherlight Powerhouse:** At just 59g, this battery keeps your ride nimble without compromise. - • **Endurance for Every Ride:** 500mAh capacity delivers extended runtimes—ride longer, charge less. ## Overview The SHIMANO BT-DN300 Battery is a lightweight, rechargeable lithium-ion power source designed exclusively for Shimano’s 12-speed Dura-Ace and Ultegra Di2 wireless shifting systems. Weighing only 59g and boasting a 500mAh capacity, it offers extended runtimes and consistent voltage for smooth, reliable gear changes across road, gravel, and cyclocross disciplines. Its compact seat tube installation and upgraded wiring make it a seamless, maintenance-free upgrade for serious cyclists seeking cutting-edge performance and durability. ## Description What Our Gearhead Experts Are Saying:"This battery made my Di2 upgrade seamless. It installs quickly in the seat tube, barely adds weight, and delivers all-season runtimes—huge step up from the older version."BT-DN300 Battery is the domes behind the next generation of Shimano’s Dura-Ace and Ultegra Di2 systems, supporting advanced wireless shifting for road, gravel, and cyclocross bikes. Packed into a compact, 59g design, it mounts stealthily in the seat tube to power both front and rear derailleurs via a single, low-profile connection. The upgraded 300-series wiring boosts reliability and integrates seamlessly with Shimano’s latest wireless controls, making setup fast and essentially maintenance-free. Engineered for longevity, the BT-DN300 delivers increased charge and extended runtimes compared to previous generations, meaning more rides between plug-ins for those who train or explore year-round. The battery also features consistent voltage output—key to smooth shifting and quick response under racing or adventure conditions. Officially compatible only with the new 12-speed Di2 series, this battery is a must-have for those futureproofing a high-performance drivetrain or refreshing a modern, wireless setup. ## Features - Compatibility: Dura-Ace Di2 - Claimed Weight: 59g - Activity: road cycling, gravel, cyclocross - Manufacturer Warranty: 1 year ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B1KP6CCT | | Antenna Location | Bicycle | | Battery Capacity | 500 Milliamp Hours | | Battery Cell Type | Lithium Ion | | Battery Weight | 0.2 Pounds | | Best Sellers Rank | #230,628 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #658 in Adult Electric Bicycles | | Brand | SHIMANO | | Built-In Media | Shifter Battery | | Customer Reviews | 4.8 4.8 out of 5 stars (32) | | Item Dimensions | 10 x 6 x 2 inches | | Item Weight | 3.2 ounces | | Manufacturer | Shimano | | Model Name | Di2 Battery | | Model Number | Shimano | | Number of Batteries | 1 Lithium Ion batteries required. (included) | | Reusability | Rechargeable | | UPC | 192790894720 | | Unit Count | 1.0 Count | | Voltage | 12 Volts | | Warranty Description | Limited Warranty | ## Product Details - **Battery Capacity:** 500 Milliamp Hours - **Battery Cell Composition:** Lithium Ion - **Brand:** SHIMANO - **Number of Batteries:** 1 Lithium Ion batteries required. (included) - **Recommended Uses For Product:** Bicycle ## Images ![SHIMANO Bt-Dn300 Battery Black, One Size | bike-shifters-and-parts - Image 1](https://m.media-amazon.com/images/I/41urKUU4bmL.jpg) ## Questions & Answers **Q: What is the diameter? I want to know if I can fit in my Cervelo seatpost** A: It will definitely fit in your Cervelo seat post. I am using mine in my Aspero. **Q: Do you have shimano bt-dn110-a di2 battery?** A: Probably ## Frequently Bought Together - SHIMANO Bt-Dn300 Battery - SHIMANO 2Nd Gen E-Tube Di2 Wire - SHIMANO Ew-Ec300 Di2 Charging Cable --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/441470536-shimano-bt-dn300-battery-black-one-size-bike-shifters-parts](https://www.desertcart.us/products/441470536-shimano-bt-dn300-battery-black-one-size-bike-shifters-parts) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-12*