Always the correct part
Beach RC says...
Dynamite's new Reaction 2.0 batteries come with all the power and performance you've come to expect from the original Reaction line, but now include a QR code directly on the battery label. You can scan the QR with the Dynamite Dashboard Smart Phone App for even quicker and easier setup. In addition, all Reaction 2.0 hardcase batteries now come in a sleek black color to better match whatever setup you use them in.