65 Whr 6 Cell Lithium-Ion Battery for Latitude E5420/E5520/E6420 XFR Laptops. Compatible Part Numbers: HCJWT, 312-1163, T54FJ, DHT0W, 312-1324 65 Whr 6 Cell Lithium-Ion Battery for Latitude E5420/E5520/E6420 XFR Laptop E5420, E5430, E5520, E5530, E6420, E6420 XFR, E6430, E6430 ATG, E6520, E6530 HCJWT, 312-1163, T54FJ, DHT0W, 312-1324