T-mobile Note 3. As the title says, I plug it in, it thinks it's charging but battery percentage continues going down. I replaced the charging port circuit board with a brand new one, still has the same problem. Did factory reset (5.0), still nothing. Tried two different chargers with four different cables, still nothing. There is no apparent damage or debris on the connector that attaches to the charging circuit board. I have no idea what the problem could be.