Perfect if we did not have this problem ... batteries

My 2 year old son had this remote control car to last Christmas. Positive point: the horn is not too strong, the remote control with 2 buttons: forward and backward, and turns button is very simple and accessible even for the smallest. Car Yes, yes has always enchanted and delighted my son !!!! It has the air resistance because it is still not broken after several falls cons I do not know if this is our model that is defective or if they are all like that but I've had to change the batteries 3 times !!!! That's still much in one month and a half of just using ...