Description: -You can put up to 3 batteries, and charge them in order from high to low. Batteries with high power are charged first. -The MINI 3 battery can be converted into a power bank to charge the remote control or other USB devices. -It can also store batteries for easy portability. -You can check the battery level -Support PD, QC3.0 fast charging Specifications: Input: 5V/9V/12V--3A (max) Output: 8.5V==4.0A (max) USB output: 5V/2A Charging time: (input: PD 40W or higher) 2453mAh battery about 90 minutes (45 minutes per battery) 3850mAh long battery life about 130 minutes (65 minutes per battery) Product size: 9.4*5.5*3CM Net weight: 60g Charging ambient temperature: 0--40°C What's Included: 1 x 3-Way Butler 1 x USB-A to USB-C Charging Cable 1 x USB-C to USB-C Charging Cable