A friend of mine recently purchased a Inspiron N5040 laptop and is not satisfied with the battery life. She is looking for batteries for the computer that would last longer than the 3-hour per charge batteries that the computer comes with. A Google search yields a list of batteries for the computer (6 cell and 9 cell) but does not say how long they last per charge. Where could I find a listing of batteries for this computer and their expected life per charge?


All batteries for this laptop are 11.1V, so the current capacity will determine the run time. The available battery ratings and approximate run times are as follows:

Six cell, older design, 4300mAH rating: 3 hours.

Six cell, newer design, 5200mAH rating: 3 and a half hours.

Nine cell, older design, 7800mAH rating: 5 hours, 20 minutes.

Nine cell, newer design, 8100mAH rating: 5 hours, 40 minutes.

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