battery won't charge after replacement

My phone won't charge past 1% after finishing the battery replacement. I carefully made sure all connectors were not bend and snapped back into place firmly and evenly including the battery connector. I have tried leaving it plugged in overnight as well as letting it discharge completely and then charging again. Did I get a bad replacement battery or is something else wrong? This is obviously very frustrating as my phone is now out of commission unless it is plugged in!