Parallel(P) is a way to assemble lithium batteries to increase capacity(mAh). If you take two cells that are both 1000mAh and build them together in parallel, the milliamps would increase to 2000mAh. If you paralleled three 1000mAh cells, it would become a 3000mAh battery. If you see 2P, 3P etc. on any of our battery listings, that just means the pack is built with multiple cells in parallel to achieve that given capacity. If you have any other questions about parallel builds, contact our battery tech team here.