Features:
1. You can check the battery level
2. You can put up to 2 batteries, and charge them in order from high to low. Batteries with high power are charged first.
3. Support PD, QC3.0 fast charging
4. The MINI3 battery can be converted into a power bank to charge the remote control or other USB devices.
5. It can also store batteries for easy portability

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: 8*6*6.2CM
Charging ambient temperature: 0—40°C
For DJI mini 3 Pro battery and long battery life.

Package includes:
1 xTwo-Way Butler
1 x USB-A to USB-C Charging Cable
1 x USB-C to USB-C Charging Cable