[Summary English translation follows]
Dois vídeos sobre a reparação de um carregador de baterias:
https://www.youtube.com/watch?v=iJaOwzxx8m8
https://www.youtube.com/watch?v=k1khxOl2UTY
Two videos about the repair of a battery charger whose fault was a damaged mode switch. The faulty double switch whose contacts should be normally opened were permanently close no matter being presses or not.