Bettkit 11.1V 5200mAh New BatteryT54FJ for Dell Latitude E6420 E5420 E5520 E6520 E6430 fit: M5Y0X T54F3 M1Y7N 312-1325 312-1165 Bettkit Battery type: Li-ion; Cells: 6-cell; Voltage: 11.1V.5200mAh 100% Brand New Battery. Up to 500 recharge cycles over the life of the battery. One Good Quality:100% OEM compatible works as original part. If you are not sure about the compatibility of this item or need help finding out the part number you need, feel free to email us through Amazon before placing your order. Our Service: Focus On Providing Quality Power Products and Excellent Customer Service,12 Months warranty, 30 Days Money Back Guarantee!Buy with confidence!