Review on 💡 High-Quality 10 Pairs of 12V 5A DC Power Pigtail Cable with 2.1mm x 5.5 mm Male & Female Connectors - Ideal for CCTV Security Camera and Lighting Power Adapter by Jen Coleman

Bought 3 packs of these from one opened so far 7 out of 10 connectors have some sort of internal break on the negative side. Slightly pressing (less than 15*) or twisting the base of the connector where the cable is connected will break the negative connection somewhere (tested by placing a multimeter on the negative cable and the outer metal part of the housing while rotating the multimeter is in continuity mode ). One of the seven had no connection even when straight and stretched. This makes it impossible to use in applications where the cable can be moved or even bent at all. However, 5 of the 5 jacks I've used so far work fine. Sockets sometimes have an open gap when connected. TL; DR: poor quality control, more than half of the connectors in a package were defective.