Battery for HaiBike SDuro Trekking 4.0

[Roseville]

Are there any reputable 3rd party accessory dealers where I could find a second battery for a HaiBike SDuro Trekking 4.0?

I'm planning a medium-long ride and don't want to get stuck. Thx

 

[rich c]

No idea if this is better than standard dealer price or not. http://www.motostrano.com/Yamaha-Haibike-SDURO-Electric-Bike-System-Parts-s/8292.htm