[Plextalk] AC adapter for plextalk pocket.

I have a question is it just my own imaganation or is the port of the plextalk pocket that the wall adapter connects to very loose? The reason i am asking is that my plextalk pocket will not charge when i use the regular wall adapter. also when using the regular wall adapter while listening to some content on the sd card i have in the plextalk pocket the unit went like totally dead, meanning that i had to take the battery out and place it back in again then it worked just fine how much does an adapter cost for the plextalk pocket?