Dentsing 90 Whir 9-Cell Lithium-Ion Primary Battery for Dell Latitude E6400 E6410 E6500 E6510 M2400 M4400 M4500 4M529 0GU715 0H1391 Model:4M529 Color:Black Voltage:11.1V Capacity:90WH Compatible P/N:4M529 Compatible with:Dell Latitude E6400 E6410 E6500 E5400 E5500 Precision M2400 M4400 M4500 M6400 Series 6 Months Warranty. If you have any issue, please contact us, we will help you resolve it before you leave a negative feedback or low review.Thanks for your kind support and patience.