Is this the right head for the battery fsa 90?

It looks like you can use the below heads on your model. 25-2 - 4002 710 2108 - https://www.lsengineers.co.uk/autocut-25-2-stihl-strimmer-head.html , C26-2 -4002 710 2169 - https://www.lsengineers.co.uk/catalog/product/view/id/180031 , Supercut 20-2 - 4002 710 2184 - https://www.lsengineers.co.uk/catalog/product/view/id/10170 Durocut 20-2 - 4002 710 2182 - https://www.lsengineers.co.uk/catalog/product/view/id/181716