The Shimano STEPS BT-EN817-B delivers 712 Wh of capacity in a sleek, frame-integrated format — giving e-MTB and e-trekking riders the range to take on longer adventures without compromise. Designed for full integration into the down tube, it pairs with Shimano's EP5, EP6, and EP8 drive units to form a cohesive, high-performance eBike system.

Highlights

  • 712 Wh capacity: 36.3 V / 19.6 Ah gives you exceptional range for extended trail riding or long-distance touring.
  • Integrated design: Mounts inside the frame's down tube via the BM-EN810-A battery holder for a clean, balanced look and feel.
  • 2nd Generation Battery Management System: Optimises charge and discharge cycles for improved efficiency, longevity, and shorter charge times.
  • Fast charging: Reaches 80% charge in approximately 3.4 hours with the EC-EN814 4A charger; full charge in approximately 5.2 hours.
  • Frame charging compatible: Charge without removing the battery via the EW-CP111 or EW-CP110 charging port (SM-BTE81 adapter required for EW-CP110).
  • IPX5 water resistance: Built to handle all-weather riding and low-pressure washing.
  • Long-lasting cells: Retains over 60% of original capacity after more than 1,000 charge cycles.

Range & Performance

With 712 Wh on board, the BT-EN817-B is Shimano's largest STEPS integrated battery, engineered for riders who demand maximum range. The second-generation battery management system works in tandem with high-quality cells to deliver consistent power output and protect cell health over thousands of charge cycles. Whether you're tackling multi-day trail adventures or long gravel rides, this battery keeps you riding further for longer.

Integrated Charging

The BT-EN817-B supports on-bike charging via compatible Shimano EW-CP111 or EW-CP110 charging ports, so you can top up without removing the battery from the frame. For EW-CP110 ports, the SM-BTE81 adapter is required. The battery can also be removed for charging using the EC-EN814 charger (sold separately).

Compatibility & Fit

Compatible with Shimano STEPS EP5, EP6, and EP8 drive units. Requires the BM-EN810-A integrated down tube battery mount (sold separately) for frame installation. The charger (EC-EN814) and battery holder are not included. Confirm compatibility with your specific e-bike frame with your bike manufacturer before purchase.

Shimano offers a limited warranty covering defects in materials and workmanship. For warranty support, return the item to Tune Cycles.
  • 712 Wh capacity (36.3 V / 19.6 Ah) for maximum range on extended rides
  • Integrated down tube design for a clean, balanced eBike aesthetic
  • 2nd Generation Shimano STEPS Battery Management System for efficiency and longevity
  • Charges to 80% in ~3.4 hours, 100% in ~5.2 hours with EC-EN814 4A charger
  • On-bike frame charging via EW-CP111 or EW-CP110 port (SM-BTE81 adapter needed for EW-CP110)
  • IPX5 water-resistant — handles all-weather riding and low-pressure washing
  • Retains 60%+ capacity after 1,000+ charge cycles
  • Compatible with Shimano STEPS EP5, EP6, and EP8 drive units
Part NumberBT-EN817-B
Capacity712 Wh
Voltage36.3 V
Amp Hours19.6 Ah
WeightApprox. 4 kg
Water ResistanceIPX5
Battery Management2nd Generation Shimano STEPS BMS
Charge Time (80%)Approx. 3.4 hours (EC-EN814 4A charger)
Charge Time (100%)Approx. 5.2 hours (EC-EN814 4A charger)
Compatible ChargerEC-EN814 (sold separately)
Compatible Charging PortsEW-CP111, EW-CP110 (SM-BTE81 adapter required for EW-CP110)
Required MountBM-EN810-A (sold separately)
Drive Unit CompatibilityShimano STEPS EP5, EP6, EP8
ColourBlack
Mount TypeIntegrated down tube
Operating Temperature-10°C to 45°C
Charging Temperature0°C to 40°C
SKU SHM-IBTEN817B
Barcode # 4550170967055
Brand Shimano

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