Do I need Extreme Shock Battery End Cap (ESBEC) for video screen shooting?
Yes, you absolutely need Extreme Shock Battery End Cap (ESBEC) for video screen shooting. This activity is one of the most punishing of all things one can do to a lighted nock of this design. The constant pounding of the arrow to the screen and the dropping of the arrow to the floor will do all kinds of damages to the custom polycarbonate nock without the ESBEC installed. To protect and prevent the circuit board, nock and battery from being destroyed, install Extreme Shock Battery End Cap is the only way we know if you want to use your Firenock with video screen shooting. From our field tests: with ESBEC installed, the system will not fail, and will survive a few dart leagues without any doubt.