Yes: the Bosch PowerPack 400 (smart system) (400 Wh, 36 V) is the native pack for a Bosch Smart System (BES3) bike. The mount and charge port to confirm, and the systems it will not fit.
Updated 05 September 2026.
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Bosch Smart System (BES3)Does the Bosch PowerPack 400 (smart system) fit a Bosch Smart System (BES3) bike?
Whether the Bosch PowerPack 400 (smart system) fits a Bosch Smart System (BES3) e-bike, and what to confirm on your own frame first.
Yes, with the right mount. The Bosch PowerPack 400 (smart system) is the native pack for a Bosch Smart System (BES3) bike (400 Wh, 36 V), charged through the Bosch smart-system round charge port.
| Battery | Bosch PowerPack 400 (smart system) (400 Wh, 36 V) |
|---|---|
| Native drive system | Bosch Smart System (BES3) |
| Verdict | fits (native pack) |
| Charge port | Bosch smart-system round charge port |
| Will not fit | a different drive system, or a different Bosch/Shimano generation even if the shape matches |
The Bosch PowerPack 400 (smart system) is proprietary to the Bosch Smart System (BES3) drive, so it fits that system and no other. The smart-system PowerPack 400 is the small external BES3 pack. It uses the smart-system round port and is not interchangeable with the BES2 PowerPack 400 despite the shared name and similar shape.
Confirm the mount and the Bosch smart-system round charge port on your own frame, because packs that look identical across generations do not always interchange.
Questions and answers
Does the Bosch PowerPack 400 (smart system) fit a Bosch Smart System (BES3) bike?
Yes, with the right mount. The Bosch PowerPack 400 (smart system) is the native pack for a Bosch Smart System (BES3) bike (400 Wh, 36 V), charged through the Bosch smart-system round charge port.