I got home Yesterday night, and relaxed on a camp mat I just got to browse with my phone.
The phone was connected to a power bank and something I can't still explain happened.

After a while, I noticed a begloted portion of the mat a and was baffled because that begloted portion was never there before. I couldn't figure out the cause until this morning when I took out my power bank to charge, I noticed a something like a 'burnt' side or scalded portion! I have read powerbanks killing people. Is this one of those similar incidence
Please, who can explain this?