Battery draining even while charging


AC Question

I have a Note 3 and my battery is draining even while the phone is plugged in. I recently bought a new battery as I thought that was the problem but it didn't help and it still goes down. I have 3 chargers in my house and sadly none are the original ones that came with the phone; I lost that one. My parents both got Note 3's too but the same chargers seem to work just fine with them, as well as my brother's S4. So can anyone tell me what could be wrong and if it can be fixed? Thanks.