Safety & Excellence Features: * No memory effect, fast charge* Low power consumption IC design* Fully compatible with the original laptops (models listed below)* Tested with strict quality control standards* Over-charge protection * Over-discharge protection * Over-heat protection * Over-current protection * Short-circuit protection * High capacity circulatory function Compatible with These Original Part Numbers: 0P891C,0T555C,312-0773,P891C,T555CFits Machine Models: DELL: Studio XPS 13,Studio XPS 1340,Studio XPS 1340nPlease make sure that the battery part numbers listed in the description matches the battery part number on your original battery before you purchase.