I Have a iPhone 6 64gb that went dead on me , as it was out of warranty I looked on line to see want the problem could be I found that it may be the battery so I change the battery and all seemed to work fine for about 4 to 6 weeks then the phone went dead again I change the battery again on the same thing happened in the same period of time , so I looked online again where I come across it might be a faulty charge port so I changed that as well as a new battery but this did not work , as the same thing happened, can anyone tell me what is causing the phone to drain my battery so fast which is killing it completely please can someone help thanks Dan