Dell 14R 15R 6 Cell Battery 8NH55 J1KND restores your computer's power system to its original performance and get more work done with the maximum battery run time. It eliminates possible risks caused by using a defective or worn out battery. These batteries are built using only top quality materials to be 100% compatible and meet your requirements. Cells are the heart of the battery. Every battery comes with multiple and redundant safety protections. All Dell batteries include multiple levels of protections to prevent dangerous conditions like overheating, overcharging, and short-circuits.