Help charging problem

[ichinazu]

Please help me as my Xperia Z has some charging problem. When I charge my phone in my house, it just charge so slowly or maybe won't even charge. I left my phone off overnight and let it charge, next morning I woke up to a dead phone.. What's happening?! But the weird thing is, when I charge my phone in my school or at my friend's house, it charge normally. Help me!!!

 

[Slug]

the weird thing is, when I charge my phone in my school or at my friend's house, it charge normally.

Same charging unit and cable? In that case I'd suspect a fault in your home wiring.