Many USB-C cables available today do not perform as expected, with testing revealing that a significant portion offer only basic USB 2.0 data transfer or limited power delivery. This issue can lead to inefficient charging and slower data transfer speeds, making it crucial to identify appropriate cables for specific tasks. For instance, some cables may not support fast charging requirements, such as 100W-240W, or high-speed data transfer of 40Gbps over USB4, despite their appearance.
The core of the problem lies in the internal components of USB-C cables, particularly the eMarker chip. This tiny chip embedded in the connector communicates the cable's specifications, including speed, wattage, and manufacturer, ensuring safety and optimal performance. Without a proper eMarker or if it's incorrectly configured, a cable might fail to negotiate power correctly, potentially damaging devices or the charger itself. For high-power cables (100W or above), an eMarker chip that advertises 5A capability is essential.
Several investigations have highlighted the risks associated with non-compliant or cheap USB-C chargers and cables. These products, often found on platforms like Amazon, B&Q, and eBay, have been found to pose fire and electric shock hazards due to their failure to meet safety standards. Experts advise against using uncertified or no-name chargers and cables, recommending instead those from reputable brands or OEM versions that are certified for USB-C Power Delivery (PD), especially PD 3.1 for higher wattages up to 240W. This recommendation aims to prevent potential damage to expensive devices and ensure user safety.
