A Kalkhoff Agattu (eBike System 2) charges through the Bosch smart-system round charge port at 4 A. The exact charger to buy for it, and the look-alike unit that will not work.
Updated 05 September 2026.
Home / Systems / Compatibility
Bosch eBike System 2 (BES2)Which charger fits a Kalkhoff Agattu (eBike System 2)?
The charger that fits a Kalkhoff Agattu (eBike System 2), the connector it uses, and the wrong unit to avoid.
Use the Bosch Standard Charger 4A (eBike System 2). A Kalkhoff Agattu (eBike System 2) charges through the Bosch smart-system round charge port at 4 A, so the correct charger is the Bosch Standard Charger 4A (eBike System 2).
| Bike | Kalkhoff Agattu (eBike System 2) |
|---|---|
| Drive system | Bosch eBike System 2 (BES2) |
| Charger to buy | Bosch Standard Charger 4A (eBike System 2) |
| Connector | Bosch smart-system round charge port |
| Output | 36 V nominal pack |
A Kalkhoff Agattu (eBike System 2) runs the Bosch eBike System 2 (BES2) and charges through the Bosch smart-system round charge port. The matching charger is the Bosch Standard Charger 4A (eBike System 2) at 4 A.
The BES2 4 A charger serves all eBike System 2 PowerPack and PowerTube batteries through the oval port. It is not the smart-system charger, so match the charger to the system, not just the wattage.
Questions and answers
Which charger fits a Kalkhoff Agattu (eBike System 2)?
Use the Bosch Standard Charger 4A (eBike System 2). A Kalkhoff Agattu (eBike System 2) charges through the Bosch smart-system round charge port at 4 A, so the correct charger is the Bosch Standard Charger 4A (eBike System 2).