Bad Attitude when asked about warranties.

In December I purchased an RC car with 2 sets of batteries (4 batteries). I charged these batteries 4 times in the last 5 months. When I went to charge the one set I noticed them miss formed. I drove through to the shop which is almost 100km one way, just to get told that there is no warranty on the batteries. I can understand that on the car but the batteries? I find this a bit strange and if they want to blame me for the damage on the batteries they must have their heads read. I have taken all pre-cautions to insure I have a decent charger so that I don't damage the batteries as they are not cheap. <br> I'll no longer drive all the way to support this shop, I'll rather look for another shop closer to me which I'll support.