FeaturesSpare battery for Omni ultimate38,400 AhEven more power on the moveIdeal for heavy duty Drone users4 hours fast chargingThe Omnicharge Omni Ultimate Spare Battery is a spare user swappable battery for Omni Ultimate, giving you even more power on the go! The Omni Ultimate\'s interchangeable battery system allows you to easily replace the batteries once they are depleted. With a spare battery charging adapter, you can recharge your spare battery outside of the Omni Ultimate using your Omni ultimate charger.