The FFC is charged via microUSB and the LED and Haptic Buzz feedback indicates when the cap is low on power and needs charging. (Powered by a 2000mAh battery the dual fans will run for 6 hours on Low and 3 hours on High speed).
• 50% – led flash 3x – cap vibrate 3x
• 20% – led flash 3x – cap vibrate 3x
• 5% – led flash 8x – cap vibrate 8x