500Wh Yamaha battery. Externally mounted (usually to the downtube) of any Haibike with a Yamaha system and an external battery.
Can also be used in place of a 300Wh or 400Wh.
 
Original Yamaha spare parts
500Wh
External mount (Downtube)
 
Yamaha
Article id: X0S8212A2100
EAN-code: 5023857605742