Connector mismatch is the #1 cause of charger returns. This guide covers all common connector types.
1. 3-Pin XLR
The most common e-bike connector. Circular with 3 pins and a locking mechanism. Used on many standard e-bikes and scooters.
2. 4-Pin XLR
Similar to 3-pin but with an extra pin, often used for BMS communication. Common on QWIC e-bike systems.
3. DC Barrel Plug
Standard round connector. Sizes: 5.5x2.5mm or 5.5x2.1mm. Used on Xiaomi, Segway, Ninebot scooters. Always confirm the diameter.
4. Bosch Oval Plug
Proprietary oval-shaped 3-pin connector for Bosch e-bike systems (Active Line, Performance Line, Cargo Line).
5. Rosenberger Connector
Premium magnetic connector used on high-end e-bikes with BMZ battery systems. Known for secure connection and durability.
6. XT60 / XT90
Bullet-style connectors for high-current applications. XT60 up to 60A, XT90 up to 90A. Common on industrial and racing applications.
7. Aviation Plug
Multipin circular connector with screw-locking. Used on industrial and high-power chargers. Very secure connection.
How to Identify Your Connector
- Take a clear photo of the connector
- Check the original charger label
- Send the photo to your supplier for identification
At Juxon, we can identify any connector type from a photo. Send us your connector photo.