Magicshine's protect circuit sets the low cut off at 2 volts per cell. Totex (Geoman and Nite Rider) sets the low limit at the standard 2.9 volts per cell.
Totex's charge termination built into the pack stops the overcharging. Totex is using a narrower range to stay within the safe limits. Would have been nice if Geoman had just leveled with us and said there is going to be a run time hit for safety's sake.