laptop battery Del Latitude E6400 E6410 E6500 E6510 Precision M2400 M4400 M4500 M6500 compatible with original battery part number PT434 PT435 PT436 PT437 KY477 KY265 KY266 KY268 FU268 FU274 FU571 MN632 MP303 MP307 NM631 NM633. Specificat