Battery Capacity: 63Wh/3941mAh lithium-ion battery provides long-lasting power for your laptop Compatible Models: Fits Dell Latitude 14 5420, 15 5520, Precision 15 3560 series laptops Safety Certified: UL, CE, FCC, RoHS certified for safety and quality assurance High Reusability: Li-ion battery cells provide up to 500 recharge cycles over the life of the battery Reliable Performance: Strict quality control and standards compliance for safety and reliability