Support phone charges very slowly, somtimes not at all

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http://androidforums.com – It takes around 5-6 hours to get a full charge, and sometimes when i leave it charging at night, it doesn't charge at all. Sometimes it stops charging and it says that it's fully charged, but when you unplug the phone it's still at the same percentage. A "voltage too high, charging paused error" pops up sometimes as well. It's not the battery or chargers because i've tried multiple chargers and I've tried my brothers battery as well. The charging port looks undamaged. it looks exactly like my brothers. Could this be from a shady app? it started around the time i downloaded somethin (General)