From the Manufacturer
Team Novak announces an all-new voltage cut-off module for use with 2, 3 and 4-cell LiPo battery packs. The Smart-Stop Auto-Detect Voltage Cut-Off Module 2S-4S (#5476) automatically detects the number of LiPo cells and adjusts to the correct safety voltage -- preventing damage to the battery pack and protecting your investment. This module is recommended for use with brushed or brushless ESCs, including Traxxas ESCs, that do not include voltage cut-off circuitry.
This is the Novak Smart Stop 2S-4S Auto Detect Voltage Cut-Off Module.
Designed for use with brushed or brushless ESCs that do not have voltage cut-off circuitry Uses a combination of throttle interruption and a visual cue from a remotely mountable blue LED Automatic set up Replaceable 6" (152mm) LED harness
Smart Stop 2S-4S Voltage Cut-Off Module with Connectors, four Zip Ties and Instructions
Connecting between receiver and electronic speed control
Input Cells: 2-4S LiPo Voltage Cut-Off: 6.25V (2S), 9.375V (3S), 12.5V (4S) Size: 0.70 x 1.20" (17.8 x 30.5mm) Weight: 0.43oz (12.2g) jxs 09/27/11 ir/jxs &