The INDI 030 discharge board is designed for stock and 19T racing, 30A discharge rate. It is the most advanced discharge / equalizing tray designed for high performance r/c car racing. The unit works on all high power Ni-Cd and Ni-MH sub-C size battery cells.. This is a 0.0v cutoff discharge board, the unit deep discharge each cell and significant benefits include charge capacity increase, discharge voltage increase, reduced peak voltage and reduced internal resistance. This type of discharger can discharge each cell individually and there is no chance for cell reversal damage to occur. The basic operation of the 030 is pretty simple and straight forward. Easy to use clamp type switch with 3 pins connector on each terminal, built in twin cooling fan, requires 12vcd input. The unid is bipolar, meaning that you can install your battery without worrying about the polarity. The 030 draws 30A rate from each cell individually.