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Does a Hailong 48 V down-tube (Bafang) fit a Bosch eBike System 2 (BES2) bike?
Whether a Hailong 48 V down-tube (Bafang) fits a Bosch eBike System 2 (BES2) e-bike, and the pack you actually need.
No. The Hailong 48 V down-tube (Bafang) is a Bafang pack and a Bosch eBike System 2 (BES2) bike needs a Bosch pack. Batteries are proprietary per drive system and do not cross over.
| Battery | Hailong 48 V down-tube (Bafang) (Bafang, about 960 Wh at 20 Ah) |
|---|---|
| Target system | Bosch eBike System 2 (BES2) (Bosch) |
| Verdict | does not fit |
| Reason | different brand, mount and charge port; Bafang and Bosch packs are not interchangeable |
| What to buy instead | a Bosch eBike System 2 (BES2) pack such as the Bosch PowerTube 625 (eBike System 2) |
E-bike batteries are proprietary to the drive system, which is the whole point of the design. The Hailong 48 V down-tube (Bafang) is a Bafang pack for Bafang BBS02 / BBSHD / mid drive, while a Bosch eBike System 2 (BES2) bike needs a Bosch pack with the Bosch mount and charge port. They do not cross over.
For a Bosch eBike System 2 (BES2) bike, fit a Bosch pack such as the Bosch PowerTube 625 (eBike System 2) (625 Wh, 36 V, BES2).
Sources: Bafang 48V ebike battery with XT60 connector for BBS02B/BBSHD (Amazon) · GreenBikeKit, Bafang BBS01/BBS02/BBSHD power cable and connectors · Urban Arrow Service Center, Differences between Bosch eBike System 2 (BES2) and Smart System (BES3) · Propel Electric Bikes, Bosch PowerPack battery · Propel Electric Bikes, Bosch Standard Charger 4A eBike System 2