My samsung galaxy tab 3 refuses to take charg
First check your usb cable. Best way is to use another phone or mp3 or anything else that uses that type of of connection. If it charges, then it is not the cable then, it becomes a case of battery, or the phone it self. If you have another cable that didn't come with the tab, try it if the connection between the tab and the cord is lose, then you new to put your warranty into effect. If it charges, then again its your cord just has a short and you need a new one. If it doesn't charge you have to call samsung, or best buy, or hhgregg and have it looked at. Maybe a bad battery or the connector to the phone is broken. Good way to know is if you stick the plug into the phone and you jiggle the cord and its loose, warranty time.