The battery may have a lock and unlock feature. Have you checked if the button lock has been engaged?
Lockable: Press the button 6-7 times within 1.5 seconds to lock or unlock the battery. The battery LED will blink when switching modes. When the battery is in lock mode, the button is disabled and the battery will not power an atomizer or cartomizer.
The best way to unlock the battery is by rapidly pushing the button until it flashes.
It could be a defective USB Charger or Wall to USB Adapter. Try using the USB charger on a computer USB port or a wall to usb adapter from a cell phone if available. If it charges quicker then, we can rule out the USB charger.
Newer versions of the Vision Spinner battery require one button push to activate the charge. To charge: Fasten the Spinner battery to a Joye Ego Rapid Charger (sold separately), if the battery button does not flash and the charger light does not turn red, activate the charge by pushing the battery button once. The button light should now flash and the charger light should turn red to indicate that a charge is in progress. The charger light will turn green when the charge is complete.