 
 <prompt> Which one of dem no need plenty power: motors, USB cables or lamps? Based on di question wey don show before, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: Some USB devices dey require more power pass wetin dey allowed by the specifications for one port. Dis one dey common for external hard and optical disc drives, and generally for devices wey get motors or lamps. Dem fit use external power supply for such devices, wey dey allowed by the standard, or use dual-input USB cable, one input dey for power and data transfer, the other one dey for power alone, wey go make the device become non-standard USB device. Some USB ports and external hubs fit, for practice, supply more power to USB devices pass wetin the specification require but standard-compliant device fit no depend on am. 