XRAY - Model racing cars

Hi can any 1 help i got my son a nitro nt18 for xmas but cant seem to get it working i think it could be down to the receiver but not sure so on the car there is a battery pack looks like 4 double aas how do u charge these if need to be charged cheers mark

I would at a guess think you got the xray electric pack with it, which is 4 x AA rechargeable batterys. Any of the modern battery chargers will charge them but would advise going to your local model shop where you purchased it to help out. Allot of modern multi home chargers would do the job but none of the charger pins would fit model stuff.