Originally Posted by naim
Actually I'm talking about the battery pack wire. It is accidentally cut off when I'm trying to close the battery compartment with the cover (not the battery wrapper). Maybe as I fitted the battery pack and it cut off. And then I had to open the battery wrapper to make a new connection (soldering the wire back to the battery pack). Can I change the whole wire with another one? Does it will affect the Tx?
Yes you can change the wire but you will also need the connector. Once crimped, the terminals of the connector can not be reused (recrimped). You do not list your location in your profile so I can not give you advice on where to get the pigtail (connector with the wires already crimped).
I'd still recommend that you get rid of the battery holder and get a rechargeable pack, preferably made of Eneloops or other brand NiMH Low Self-Discharge cells.