[Q] Battery drain while charging

So I recently encountered a problem with my phone charging. Previously, I am able to charge while chatting via Whatsapp etc. but after playing a game my phone heated up so I turned it off to cool it down. Now my phone will not sustain a charge if the wifi is turned on and left alone. I had used a new battery and charger but the problem persists.

Did I just kill my phone power management capability?