This is a very important passage and should be explained (and illustrated) better in the guide. The battery is not only glued but is also hooked, at the screw hole, to a rear metal pin. So after unscrewing it and unscrewing the screw, it is necessary to lift it very gently from behind at the connector, so as to release it from the pin. I used a fairly long screwdriver, insulated with plastic tape. Be careful, of course, not to damage the logic board.

In any case, you don't need to disassemble the entire iPad as shown in the next steps.

All the following stages of detachment are very risky because it is VERY easy to break the glass, especially on the side of the Home button. In particular, if the glass already has a crack (even a small crack) it is practically impossible to detach it without breaking it even more.

In the iPad Air 2 the screen is firmly glued to the glass, and is not secured with screws. It is impossible to peel off only the glass. I think you're talking about another model here.