Our new high HCL-EC ( high cycle life economy) 5200mAh-100C  packs are intended for those who want a high quality pack with good performance at a good price.   These packs are made with 100% LCO for maximum cycle life and good performance. Packs at a similar our lower price typically use a blend of LCO , LicoMnNio2 or NMC.   This lowers the cost of the packs but also decreases the performance.