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Bosch eBike System 2 (BES2)Does the Bosch PowerTube 625 (eBike System 2) fit a Bosch eBike System 2 (BES2) bike?
Whether the Bosch PowerTube 625 (eBike System 2) fits a Bosch eBike System 2 (BES2) e-bike, and what to confirm on your own frame first.
Yes, with the right mount. The Bosch PowerTube 625 (eBike System 2) is the native pack for a Bosch eBike System 2 (BES2) bike (625 Wh, 36 V), charged through the Bosch eBike System 2 oval charge port.
| Battery | Bosch PowerTube 625 (eBike System 2) (625 Wh, 36 V) |
|---|---|
| Native drive system | Bosch eBike System 2 (BES2) |
| Verdict | fits (native pack) |
| Charge port | Bosch eBike System 2 oval charge port |
| Will not fit | a different drive system, or a different Bosch/Shimano generation even if the shape matches |
The Bosch PowerTube 625 (eBike System 2) is proprietary to the Bosch eBike System 2 (BES2) drive, so it fits that system and no other. The BES2 PowerTube 625 measures 416 x 84 x 65 mm and weighs about 3.5 kg. It is physically larger than the 400 and 500, so it only fits frames built for the 625, and it uses the BES2 oval charge port, not the smart-system round port.
Confirm the mount and the Bosch eBike System 2 oval charge port on your own frame, because packs that look identical across generations do not always interchange.
Sources: Bosch eBike Systems, PowerTube and CompactTube batteries · Propel Electric Bikes, Bosch PowerPack battery · Urban Arrow Service Center, Differences between Bosch eBike System 2 (BES2) and Smart System (BES3) · Propel Electric Bikes, Bosch Standard Charger 4A eBike System 2