Yeah that NRX-10 would go through 2Ah in about 2-3 min of hard driving with high grip tires.
I would double check to see if the ESC has LVC enabled, you may have got away with it with the drift tires not putting much load, but high grip rubber will pull some serious current.
I would...
2Ah isn't very much capacity, is this a 1/10 car or smaller scale?
If it's a mini then chances are you may have overheated the motor and it may need to be replaced.