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I bought a second hand Rog laptop the battery appeared in the being as charging but now the laptop dosnt detect a battery and the charging led flashes after a while of it being on the guy supposed replaced it but it was over heating too and be added what looked like a block of thermal paste on and it was cooking it self so I don’t trust him should I replace the battery or what? Anyone else having this issue also the battery when detected didn’t work either

@dyslexic_turkey all of this “but it was over heating too and be added what looked like a block of thermal paste on and it was cooking it self” should be reason enough to get a new battery first. right now you do not have a known-good starting point for any trouble shooting. The overheating is most likely not caused by your laptop but by a failure of the battery.