According to my understanding, 21 Tang DM retrofit fast charge may have an impact on the warranty. In general, retrofitting a vehicle may violate the terms of the original manufacturer's warranty, as the retrofitting may affect the vehicle's electrical system and charging system. If you have made a quick charge modification to the Tang DM, it is recommended that you consult with the original manufacturer or dealer to understand the specific impact of the modification on the warranty. In addition, modified vehicles may require additional maintenance and maintenance to ensure their proper operation and safety.