When evaluating LED rolling trays, prioritize battery capacity (mAh) and charging interface. Look for models with at least 600mAh to 1000mAh lithium batteries to ensure long usage times between charges. Ensure the device uses a USB-C charging port for faster charging and better compatibility with modern cables. Additionally, verify the LED light modes (e.g., RGB color cycling, pulse, or steady glow) and the material quality, typically high-grade ABS plastic or tinplate, to ensure durability and a smooth surface finish.