Replacing Edge 130 Battery

Has anybody replaced the battery in their 130?

My unit is now several years old and after regular use I am noticing battery life is (as expected) reducing.

I must have been lucky as initially it would last for over 10 hours but now after a 2 hour ride the battery indicator is on the last bar.

I am also struggling to see how it comes apart. It appears the screen must pop out and it is assembled from there. There are replacement screens and what appear to be batteries on Ali express but no details on how to replace.