Egoway Replacement Battery for Dell Inspiron 1440 1526 1525 1545 1546 1750 Battery Type: Li-ion; Voltage: 11.1V; Capacity: 5200mAh; 6 Cell. Compatibility: Made for Dell Inspiron 1526, 1525 , 1545, 1546, 1440, 1750, PP29L, PP41L. Compatible Part Numbers: 312-0625, 312-0626, 312-0633, 312-0634, 312-0763, 312-0844,312-0940, 451-10478, 451-10533, 451-10534, M911, M911G, lBD1525, C601H, D608H, 0F965N, 0F972N, G555N, G558N, GP952, GW240, GW252, 0GW252, GW952, HP277, HP297, J399N, 0J410N, J414N, J415N, K415N, K450N, LBD1525, N586M, P505M, RN873, RU583, RU586, RU591, UK716, WK379, X284G, X409G, XR693, 0XR693, XR694, XR697, XR682, Y823G Operation time:Same Battery life with Brand new original Dell battery.In reality, this will depend on the amount of electricity required by the device and how you use it. Warranty: 18 Months, 30 days money return guarantee, 24 x 7 email support.