Originally posted by S-T-R-l-K-E-R
i would recommend 6.0V cause if you set it at 5.4V cutoff you are risking of overdischarging one of your cells below its intended cutoff volts of .9
since .9V x 6 cells = 5.4 cutoff (5.4 cutoff is purely theoretical cause not all cells have exactly the same voltage at the same time.)
most often one or two cells have gone below the .9 cutoff when you cutoff at 5.4
why dont you pullout your multi-tester and see it for yourself.
This problem is lesser with matched cells. But it's true, it's a downside of discharging as a pack.
But usually it works well anyway, because at higher loads, the IR in the pack result in a larger voltage drop, so when the discharger cuts off, there's still a reasonably amount of charge in each cell. Next step is to put the pack on an equalizer, which further will prevent this problem.