Things You'll Need
Instructions
Open up your aircraft's fuselage according to your particular model's operating instructions. Locate your receiver's battery pack and disconnect the flat connector that features a black and red wire (negative and positive) from the radio receiver terminal with the "+ -" marking.
Plug in the supplied wall charger that came with your Spektrum DX-7 system to an available electrical wall outlet. Connect together the small battery charger connector (black and red wires with flat black female connector) to the corresponding male connector of the receiver's battery pack.
Keep the battery pack connected to the charger for 16 hours to ensure a full and complete charge. Disconnect the battery pack from the wall charger and reconnect the battery pack to the receiver unit's "+ -" terminal. Reassemble your aircraft and ready it for flight.