Can I replace my ASUS z580ca battery on my own?

Yes sure you can. It's quite easy to do so. You might also watch the following video as your reference. Once you finished it, you are most likely able to replace it on your own.

In case you are still looking for a ASUS z580ca replacement, here tell you where to find a original pack. Since Christmas is coming, we offer up to 25% off sale this month.

https://www.storebattery.co.nz/asus-z580ca-1b-3.8v-4000mah-laptop-battery-store-for-new-zealand-p-178456.html