When evaluating Hybrid Electric Bikes (e-bikes), focus on the Motor Type, Battery Capacity, and Frame Geometry. For B2B buyers, Mid-drive motors are preferred for high-end performance due to better balance, while Hub motors offer cost-efficiency for entry-level markets. Ensure the battery uses Grade A Lithium-ion cells (e.g., Samsung, LG, or Panasonic) with a capacity of at least 36V/10Ah for a reliable range. The frame should be constructed from 6061 Aluminum Alloy to ensure a lightweight yet durable structure capable of handling both urban and light off-road terrains.