Imaxrc X100 - Manual (Page 9)

Please follow the below steps connecting:
1: Please connect the AC power cord with X100 charger, and
then plug adapter of power cord into socket.
Connecting X100
【NOTE】 USB support 5V 2.1A charging voltage,and also use for iPad
/ iPod / iPhone / HTC and other intelligent electronic equipment. Both the
USB and battery get charged simultaneously.
2: Connect battery correctly with X100. If LiPo battery, pls
also connect balance adapter of battery with balance port of
X100.