First of all we must remove the tray from the cards.

We apply a little heat to the back cover to detach it with greater ease, for this we have used a double suction cup tool, and when we have managed to lift the casing a little we have taken advantage of to introduce a plastic pick to go off all the edges of the Case. Once the casing is removed, we remove the adhesive that is observed in the last two photos of this step.

Remove the three Phillips screws (PH # 00) that hold the shield covering the connectors.

We disconnect the flex from the battery, and the flexes that are above the battery, which are the interconnection and the screen. Once the flexes are disconnected, we will raise a little the battery that we are going to replace and with a card, which we can wet a little with alcohol so that it is easier to take off the battery, we will take it off little by little.