I can't see where the battery is in D3 pro. What is the capacity of the battery?

Articles in this section

• Will winter affect the D3 pro's range?
• Sometimes I need to take it outdoors, is D3 pro heavy?
• The bike looks small and I wonder if D3 pro can handle steep hills?
• I can't see where the battery is in D3 pro. What is the capacity of the battery?
• With such a simple frame, what is the payload of D3 Pro?
• What is the difference between the standard model and the seat post pump for D3 pro?