Equivalent to 12,000 mAh, two and half additional charges. Optimal operating temperature < 20°C (-4°F). Not recommended for use over 30°C (86°F). Easy slip-in design for protection and charging. Supports X1 PRO/PROMAX's instantaneous wake-up from sleep-mode. Includes a detachable strap for charging on the go. Supports X1 PRO/PROMAX's instantaneous wake-up from sleep-mode Compatible with HOVERAir X1 PRO and HOVERAir X1 PROMAX