The optional battery supply does not include USB cables, as many users may already have the necessary cables from their light purchase. The Anker power converter requires a minimum voltage and amperage to function properly with the lights. Not all USB cables meet these specifications; some are primarily designed for data transfer and may not support the required current. The fast-charging cables are optimized for use with the frame and battery supply to ensure adequate power delivery to the voltage converters. They are also shorter to fit within the frame. Each package contains two cables, providing convenient spare options.