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Bosch Smart System (BES3)

Does the Bosch PowerTube 500 (smart system) fit a Bosch Smart System (BES3) bike?

Whether the Bosch PowerTube 500 (smart system) fits a Bosch Smart System (BES3) e-bike, and what to confirm on your own frame first.

FITS

Yes, with the right mount. The Bosch PowerTube 500 (smart system) is the native pack for a Bosch Smart System (BES3) bike (500 Wh, 36 V), charged through the Bosch smart-system round charge port.

ConnectorBosch smart-system round charge port
Power panel
Voltage
36 V
Energy
500 Wh
Connector
Bosch smart-system round charge port
Drive system
Bosch Smart System (BES3)
The battery and the system
BatteryBosch PowerTube 500 (smart system) (500 Wh, 36 V)
Native drive systemBosch Smart System (BES3)
Verdictfits (native pack)
Charge portBosch smart-system round charge port
Will not fita different drive system, or a different Bosch/Shimano generation even if the shape matches

The Bosch PowerTube 500 (smart system) is proprietary to the Bosch Smart System (BES3) drive, so it fits that system and no other. The smart-system PowerTube 500 is a lightweight in-tube pack for BES3 bikes. It is not the same part as the BES2 PowerTube 500 and will not fit an eBike System 2 bike.

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.

The battery to buy
Battery, system and alternatives

Sources: Bosch eBike Systems, PowerTube and CompactTube batteries · Urban Arrow Service Center, Differences between Bosch eBike System 2 (BES2) and Smart System (BES3) · Qiolor, Bosch e-bike motor compatibility explained