So 24 cells would make me up 6 12v packs as each cell is 3.3v? The old set up was 3 12v nicad packs all into 3 different plugs, so I could make up enough to have a full set of spares put of 24 cells?

Or better to make a 2 24v packs? Can run 24v worth of hawkers on a single lead out of the 3 but still trying to get my head around the wiring and how many packs I could/would have too use and at what voltages