•Designed specifically for DJI Mavic series batteries (5000mAh). It is recommended to use for DJI 65W USB-C charger or other chargers that support USB PD fast charging protocol. Come with a USB C to C data cable •It can charge four Mavic 3 Pro/Mavic 3 Classic/Mavic 3 Cine/Mavic 3 batteries. The batteries are charged in order from high to low according to the battery power,eliminating the trouble of plugging and unplugging one by one when charging multiple batteries. It takes about 75 minutes to fully charge 1pc 5000mAh battery •The LCD screen can display real-time data of the rechargeable battery - voltage,current,power,charging time,battery capacity,battery temperature,charging progress bar and battery power percentage; the LCD screen can visually display the power of the four batteries,eliminating the anxiety of running out of power; Battery capacity reflects the battery life •There is no need to plug the battery back into the drone,put the battery into the charging butler,press the battery button to check the battery power; press and hold the power button to switch between full power mode/storage mode,and the full power mode can be charged to 100%. In battery storage mode,when the battery power is lower than 60%,the battery will be charged to 60%. When a battery is ready for long-term storage,it needs to be kept at around 50%-80% charge. Full power and low power storage can cause battery damage. The indicator light will not flash when charging is completed •Suitable for all types of drone storage bags and backpacks,compact and easy to carry. Intelligent trickle current ensures battery saturation while reducing battery charging temperature,effectively protecting battery life Note: •Newly purchased batteries or batteries that have not been used for a long time will be in a dormant state. Please charge the battery on the drone and wake it up from sleep mode before use. •If you put a battery in hibernation mode into the charging butler,the charging butler will not respond. Package included: •1 x Charging Butler •1 x Data Cable •1 x English and Chinese User Manual •Other items not include