I think he is saying he has a old charger from a RC car .
Yes you should get a charger for that battery that is to balance each cell . One thing you do not want is a problem with the battery on a aircraft .
If I misunderstood what your asking sorry .
To put it simply, you should not attempt to charge a LiPo battery with a NiCad or NiMH charger. The 2nd lead is a balancing cable and crucial for safe charging. Without it, you could cause a lithium fire due to the battery bursting through cell overcharge.