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Specifications: Battery Type: Lithium- battery Charging Time:1-1.5h Capacity:5400mAH Operating temperature: 0-40 Celsius degree Replacement for : UPair One 2.7K/2.7K Plus UPair One 4K/4K Plus Drone Battery Charging the Intelligent Flight Battery 1.Connect the Battery Charger to a power source 2.Connect the Intelligent Flight Battery to the Battery Charger.If the battery level is above 95%,turn on the battery before charging. 3.The Battery Level Indicator will display the current battery level as it is charging. 4.The Intelligent Flight Battery is fully charged when the Battery Indicator are all off. 5.Air-cool the Intelligent Flight Battery after each flight.Allow its temperature to drop room temparature before storing it for an extended period. Package include : 1*5400mAh UPair Intelligent Flight Battery