For DJI Mini 3/4 Pro Drone Battery Charger 3-Way USB/Type-C Fast Charging Hub Features: 1. You can check the battery level. 2. Small size and easy to carry. 3. Can charge 3 batteries in sequence. 4. Automatically detect, give priority to charging high-power batteries. Specification: 100% brand new Name: Charging Manager Product material: ABS Product color: gray Product weight: 61G Packing weight: 113G Product size: 94×55×30mm Packing size: 103×82×40mm Charging ambient temperature: 7-40℃ Output voltage: 8.5V 4.0A (Max) Input voltage: 5V/9V/12V/20V 3A Support PD fast charge (Max) Recommended charger: DJI 30W USB-C charger or other charger that supports USB PD fast charging protocol Compatible model: For DJI Mini 3/3 Pro/4 Pro Instructions for usage: Prioritize charging of high-capacity batteries 1. Connect the battery to the charging butler and press the function button to check the battery level without wiring. Then connect the power to the charging housekeeper to charge 2. Charging time: 45 minutes with a single battery capacity of 2453mAh 3. Charging time: 65 minutes with a single battery capacity of 3850mAh 4. Put in 3 batteries at the same time with a capacity of 2453mAh, charging time 3X45=135 minutes 5. Put in 3 batteries at the same time with a capacity of 3850mAh, charging time 3X65=195 minutes Package Included: 1*Charging Butler 1*USB-C Charging Cable 1*Type-C to Type-C Charging Cable 1*Manual