When evaluating an electric cargo trolley, you must prioritize the Load Capacity, typically ranging from 300kg to 1500kg depending on the model. Pay close attention to the Motor Power (measured in Watts); a brushless DC motor of at least 500W-1000W is recommended for heavy-duty tasks. Additionally, verify the Battery Type and Capacity, favoring Lithium-ion batteries for longer life cycles and faster charging, or Lead-acid batteries for cost-effectiveness in low-intensity environments. Ensure the Climbing Gradient capability matches your facility's ramps, usually requiring a 15-25 degree incline rating.