HWG Laptop Replacement Battery (T54FJ) Compatible Dell Latitude E5420 E5520 E6420 E6520 Compatible with HCJWT 312-1163 NHXVW M5Y0X Battery type: Li-ion; Capacity: 5200mAh; Cells: 6-cell; Voltage: 11.1V. 100% NEW from manufacturer; Up to 500 recharge cycles over the life of the battery. 24 x 7 email support; 12-month hassle-free warranty. Every battery has passed factory testing; Durable grade A cells battery; Quality assurance. Fulfilled by Amazon.