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Bosch eBike System 2 (BES2)

Which replacement battery fits a Kalkhoff Endeavour (eBike System 2)?

The replacement battery that fits a Kalkhoff Endeavour (eBike System 2), the charger it uses, and what not to buy.

FITS

Fits with the Bosch PowerTube 500 (smart system). A Kalkhoff Endeavour (eBike System 2) runs the Bosch eBike System 2 (BES2), so the replacement battery is the Bosch PowerTube 500 (smart system) (500 Wh, 36 V, BES3).

ConnectorBosch smart-system round charge port
Power panel
Voltage
36 V
Energy
500 Wh
Connector
Bosch smart-system round charge port
Drive system
Bosch eBike System 2 (BES2)
This bike's fitment
BikeKalkhoff Endeavour (eBike System 2)
Drive systemBosch eBike System 2 (BES2)
Battery that fitsBosch PowerTube 500 (smart system) (500 Wh, 36 V, BES3)
Charge portBosch smart-system round charge port
ChargerBosch Standard Charger 4A (eBike System 2)

The Kalkhoff Endeavour on eBike System 2 uses a BES2 in-tube PowerTube, commonly the 500 Wh.

The BES2 PowerTube 500 uses the oval charge port; a smart-system PowerTube 500 with the round port will not fit.

The battery to buy
Battery, system and charger

Sources: 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 · Bosch eBike Systems, PowerTube and CompactTube batteries