iFixit does not sell all parts for all devices. I am pretty sure that they do not sell this spesific battery for this computer, however, Dell does. You can find the OEM battery for the computer here: https://www.dell.com/en-us/shop/pfydresults/275206
You may be able to find 3rd party batteries, or used batteries for way cheaper, but the safest option is to buy from Dell, as they made the computer, so they should have the best support and quality.
iFixit does not sell all parts for all devices. I am pretty sure that they do not sell this spesific battery for this computer, however, Dell does. You can find the OEM battery for the computer here: https://www.dell.com/en-us/shop/pfydresults/275206
You may be able to find 3rd party batteries, or used batteries for way cheaper, but the safest option is to buy from Dell, as they made the computer, so they should have the best support and quality.