https://www.dell.com/en-ca/shop/dell-45-whr-4-cell-primary-b...

I focused more on the fact that they were still willing to provide this level of support for the repairs that such an old machine might need than on the particular part I chose to buy. My battery could use a replacement too, but I use it plugged in too much for me to want to spend on that. In a different lifestyle I'd buy that as well.