Features:

• Battery Type: Li-ion / Capacity: 14.8V, 4460mAh
• Replacement for Dell Laptop Battery 1691P, 312-0009, 312-0028, 312-3250, 75UYF, 77TCJ, 851UY
• 5208U, 53977, 3149C, 1K500, 2M400, 3H352, 8M815, 77TCJ, 851UY.
• For Dell Inspiron 2500, 3700, 3800, 4000, 4150, 8000, 8100, 8200/Latitude C, CP, CPi,
• CPIA, CPIC, CPIR, CPM, CPT, CPTV, CPx/Latitude PPL, PPx/Precision M40, M50.

Editor Reviews:

Product Description:
For Dell Inspiron 2500, 3700, 3800, 4000, 4150, 8000, 8100, 8200/Latitude C, CP, CPi, CPIA, CPIC, CPIR, CPM, CPT, CPTV, CPx/Latitude PPL, PPx/Precision M40, M50. For Dell Part No. 75UYF, 1691P, 312-0009, 312-0028, 312-3250, 5081P, 5208U, 53977, 3149C, 1K500, 2M400, 3H352, 8M815, 77TCJ, 851UY.

Rating : - Good quality, better performance
I bought a pair to replace the dead batteries in my Dell Latitude CPi. With both batteries fully charged, I can get 12-14 hours of continuous run time, about 15% better than the OEM batteries. I would consider these to be a great upgrade to keep your old laptop running for years.