Choosing the right replacement battery for Inspiron 1525

Hi All,

I am using Dell Inspiron 1525 whose battery life is already over.  The part no. for battery as per my laptop invoice is as:

312-0404 53 WHr 6-cell Lithium Ion Primary Battery, for Inspiron 6400/E1505

Now I need to purchase a new relacement battery but I am not able to locate with same part no.

Please suggest me what is the compatible battery that I can purchased for my laptop.

Thanks

 DG