Seems like port issue.Clean the port or change it might fix that.i had same problem sometime it charges with 1.5A and some time with 250 mA and takes lot of time due to poor connections os cable
Here Near Kandy SW Monsoon lasted less than 1 week. I can remeber my school days,after monsoon started eagerly awaiting weeks for good sunray to end the damp surrounding .Now dats No more.