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Traduzione in corso passo 4
Carefully lift the battery from the side nearest the four gold contact pins, but don't try to fully remove it yet.
Carefully desolder the four wires from the power supply board in order to completely detach the battery. There is very little room for the soldering iron without damaging the case or the board; you may want to remove the board first.
For help with soldering, see the soldering guide.