The original length of the USB cable connected to the UltRA Trail Light was one meter... or 39 inches. That length allowed most mounting options including those with the light in the front and the BatPak in the back. The excess cable was simply rolled up and stowed with the BatPak.
The feedback from the vast majority of users was that that length was unnecessary and they would rather not have the coiled excess to deal with. So we switched to an 18 inch cable. This length accommodates most mounting scenarios and virtually eliminates the coiled excess.
For the applications that require the additional length, we offer an 18 inch extension cable.