Chosen Solution

Hello All, I recently bought a used iPhone with cracked (minor) screen from my friend. So I just installed a new LCD and get it fixed. But after putting the phone together it is overheating like anything. Also battery drains quickly from 20% to 0% within 14 minutes. Can anybody help me to fix this thing?

Did you install the battery grounding clip?

I replaced a lcd screen on iPhone 4s and power button everything works fine, but once im calling start getting hot