Scenario Characteristics: Urban residents commute daily with relatively fixed mileage (typically 10-30 km/day), with the highest sensitivity to battery lightweight design, charging convenience, and long-term cost of ownership.

Core Requirements:
Lightweight and detachable for easy for charging
Medium range (40-60 km) to meet 2-3 days of commuting needs
Long cycle life to reduce average annual usage cost
Fast charging capability to accommodate fragmented charging habits