The box has built-in charging, says it needs DC input of 9v-10v ( I have SO MANY DC wall-warts with an output voltage of 9v!)
Specification:
Input Voltage: DC 9 ~ 10 V
Output Voltage: 5.2V, Load: 5V
Rated Input Current: 2A, 1A ( Min )
Output Current: 2A ( More than 2A , circuit...