Battery draining while charging, Galaxy Note 3. Is this normal?

[AC Question]

Battery draining while charging, Galaxy Note 3

My battery level is getting low and low even when i am charging it from a '2a wall charger'. Yes I am using original charger and cable. Is it normal, the battery drain when i am on Wi-Fi and i am playing online games? It is fine when it is charging and i am not using my phone. It charges pretty fast. But whenever i am on Wi-Fi, playing games or just browsing, it is draining.. What should i replace? The charger? Cable? Battery? Or the phone itself?
Thanks in advance.

 

[B. Diddy]

Welcome to Android Central! When it's plugged into a wall outlet, go to Settings>Battery and see if it says "Charging (AC)" or "Charging (USB)." If the latter, that means either the charging block is faulty, or there's an issue with the phone's microUSB port. The current when USB charging is typically much lower than when AC charging, and can be easily outstripped by the battery used while playing a game. The first thing to do would be to try a different charger.