Matched refers to voltage matching. No cell is really 1.2 volts, but somewhere in the range of 1.14-1.17 per cell. When you see matched packs, you'll receive cells with identical voltages, which is an awesome thing for racing since the cells will be consitent to one another. When drifting, that's not all that important, so these Radio Shack stick packs are an aweome buy.