Express Charge must be enabled within Dell Power Manager software, selecting ExpressCharge™ can recharge system battery from 0% up to 80% within 60 minutes.  System must be powered off or in hibernation mode for ExpressCharge feature to function.  After charging has reached 80% capacity, charging speed will return to normal speed.  Recommended for use with the provided Dell power adapter; not recommended with a smaller capacity power adapter. Charging time may vary.