First of all we must extract the tray of the cards.

Remove the two Pentalobe screws (TS1), and with the aid of suction cups and a fine tine, we will uncouple all the edges of the casing, so as not to damage the casing we can change the metal plectrum with plastic ones.

We extract the five Phillips screws (PH # 00) that hold the speaker and the lower shield.

Remove the three Phillips screws (PH # 00) that hold the shields.

We disconnect all the flexes that are concentrated above the battery.

Finally we will take off the battery that we are going to replace, for this we use a plastic tool and we have been introducing it little by little, trying not to damage the battery too much, since it is very well attached to the chassis.