BULL-TECH M2400 M4400 M4500 New Laptop Battery for Dell PT434 Latitude E6400 E6410 E6500 E6510 Precision M6500 P/N: 4M529 KY265 KY470 KY471 PT434 NM631 312-0749 312-0748 Battery Type: Li-ion;Capacity: 56Wh;Voltage: 11.1V;Cells: 6-cell; Replacement for following part numbers: Dell Compaq: 312-0749, 312-0748, 312-0754, KY477, PT434, KY266, KY285, U844G, FU268, FU571, PT437, FU274, PT436, NM631, 0KY477, 0PT434, 0KY266, 0U844G, 0FU268, 0PT437, 0FU274, 0PT436, 0NM631, W1193, TX283, 0TX283 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Warranty: 18 Months Warranty,30 days money return guarantee!