Connector Bosch Round vs Connector Rosenberger: specs compared
Updated 05 September 2026.
5
specs differ
Connector Bosch Round and Connector Rosenberger differ on 5 specs: pins / contacts, current rating, voltage range, locking, common uses.
| Spec | Connector Bosch Round | Connector Rosenberger |
|---|---|---|
| Pins / contacts | keyed round contact, smart-system specific | magnetic contact face, self-aligning, snaps on and pulls off cleanly |
| Current rating | 4 A on the standard smart-system charger | sized for the pack, typically a 4 A charge on Specialized |
| Voltage range | 36 V nominal pack | used on 36 V (42 V charge) high-end packs |
| Locking | keyed round, smart-system only | magnetic, self-aligning, no exposed pins to bend |
| Common uses | Bosch smart system (BES3) PowerTube, CompactTube, PowerPack and PowerMore batteries | high-end e-bikes, notably Specialized Turbo, where it charges through a magnetic port |
Questions and answers
How do Connector Bosch Round and Connector Rosenberger compare?
Connector Bosch Round and Connector Rosenberger differ on 5 specs: pins / contacts, current rating, voltage range, locking, common uses.