Different models have different charging systems. One RC Helicopter comes without charger. That has to be charged by the cells of remote. A wire is given in remote also to charge helicopter. Once comes with USB charger. That connects to computer and other points goes to wire coming out of helicopter. This same wire goes in to the helicopter to make it operational. One comes with charger. The charger is put in to switch and other point goes to same wire that goes into helicopter to provide it electric power.
To charge the helicopter, connect the helicopter to transmitter. There is wire with plug from the life hand side of the transmitter. Turn on the transmitter and red light bright indicates that the helicopter is charging. You can also charge using the USB cable. Connect the USB cable to the computer first, red light bright show that the USB is ready for use. Charging time is 30-35 minutes.