Hello martinijo, good evening. :)
Yeah I think there's a problem with your laptop battery. I read some posts from the other sites that their laptops won't turn-on if the adapter is not plug into the wall socket. And some of their laptops as well will take only 30 mins and it shutdowns. They just replace the battery and all goes fine. But this is just base on what I read. It's up to you if you will believe it.
Take care and God bless. :)
SHENGTON
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