The Yamaha EX400 410Wh e-bike battery. Specification 36.5V 11.Ah 410Wh. Type: PASB6. Model: X2S-A0. Lion Battery. 10INR19/66-4. Compatible With: Yamaha PW-X2 drive systems.
Best Price: £299.00 from Merlin Cycles
Yamaha EX400 X2S-A0 410Wh Frame Battery – Black / 410 Wh Reviews