I bought Trek Valencia + about one month ago. I am little disappoint for the capacity of battery and I want some more power. Do you know will the Bionx 48V (8.8Ah/423Wh) Rear Rack Battery fit to Trek? Is the trail suitable? Or should it be changed? Or Should I also change the whole rack of bike?
The battery in Trek is 40.7V and 44 cells (260Wh).
It would probably work but only marginally better for the cost involved. To get more power <8v is not going to offer much and a 8.8ah battery is not going to give you much for extra distance, especially with more power. For more technical advice I advise a trip over to www.endless-sphere.com