The 150C Dual Core pack offers the highest performance of any LiPo battery available in the world. Rather than using one 8000mah cell, we take two 4000mah 150C cells and put them together in parallel. By doing this, the power load is split between two cells (cores) instead of one. Each cell has the thickest and lowest resistance tabs available. Not only do you get two cores, but you get 4 tabs instead of 2.