If the outlet is working and your device is still not charging, you may have a bad USB port. If your device only charges when the plug is held at a certain angle, will not plug in all the way, or has visibly bent/broken pieces inside the charging port, you should replace the USB port. If you have left the Air Raid charging for a long time, but the battery dies quickly after unplugging it, you may need to replace the battery.
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