DEE6400-9 - 9 cells - Laptop Battery For Dell Latitude E6400 E6410 E6500 E6510 Precision M2400 M4400 M4500 P/N's: 4M529 KY265 PT434 312-0749 (6600mAh) Fit models: Latitude E6400 E6410 E6500 E6510 Precision M2400 M4400 M4500 P/N's: 4M529 KY265 PT434 312-0749 Full 1 year warranty 100% money back guarantee within 60 days of purchase Brand New Replacement Laptop Battery. Specifications: 9 cells, rated at: 11.1v, 6600mAh, color - Silver