Dell laptop having issues with charging. Recognises charger and starts charging automatically and then doesn't recoginse charger and won't charge

I have a 7 year old dell vostro and this issue arose suddenly when one day I noticed that my laptop was lagging significantly. I went to the task manager to see the issue and in the performance tab the CPU was working at only 14%. It was throttled to the point where performance was garbage. The issue was laptop wasn't charging. I changed the charging port. Replaced the adapter. Installed and reinstalled the drivers. Reinstalled windows. And it won't recognize the adapter (even the genuine one) at all and refuse to charge. And then one day it automatically was charging, recognizing every adapte

Question by Ali Mustafa on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.