Hi there, based on your question about looking for a laptop battery, I've highlighted a few options from the search results that may interest you: The Dell Vostro 2421 2521 Inspiron 14 15 3421 3521 Xcmrd Laptop Battery 11.1 V 4400MAH 49WH is available for R590. This has a high capacity of 4400mAh which will provide long runtime between charges for your laptop. The Battery For Dell Inspiron 14 3421 15 3521 15R 5521 with a rating of 2200mAh and capacity of 33Wh is available for R619. This is a well rated battery that directly fits the Inspiron laptop models you asked about. The Astrum Laptop Replacement Battery Dell Inspiron 6 Cell and 14 Cell options are available for R699 and R899 respectively. Astrum batteries come with a warranty for peace of mind. Let me know if you need any other details on these battery options or if you have a specific laptop model in mind. I'm afraid I don't have pricing for every possible battery, but I hope these suggestions are helpful for finding a new one for your laptop!