Me dejé el cargador en su casa
Why is "me" used in this?
2 Answers
Some pronominal uses just have to be learned.
It is in our dictionary:
http://www.spanishdict.com/translate/dejar
PRONOMINAL VERB
dejarse
2 (olvidar) to leave
se dejó el bolso en un taxi she left her bag in a taxi;me he dejado el dinero en casa I've left my money at home;me he dejado la luz encendida I've left the light on
In this case personally I would view the pronominal pronoun (me) as a sort of intensifier that means I did it (on/to) myself- which emphasizes that I left it accidentally, not on purpose.
I too am a learner, so wait for other input as well.
To my ears, me dejé el cargador doesn't click. I would have simply said dejé el cargador en su casa.
A very different version (which I often use) is to say se me quedó el cargador en su casa.
