The difference between the D15i and D15 Pro is in terms of the battery pack; while the former gets a single lithium-ion battery, the latter gets an additional VRLA (lead-acid battery).
Don't buy bgauss electric bike, not use this bike, I have purchased b8 model and facing a lot of issues and I strongly recommend don't buy any bgauss bike. Li-on battery issues and no mileage Seat noise issues and it is a complete fiber one, no full load, and b8 and d15
Inappropriate review? Report Abuse