The ATV battery does seem to drain pretty fast. I get it's a mechanic but realistically a vehicle has a part called an alternator which keeps the battery charged while the vehicle is running. It seems like a bit of a weak maintenance addition to the ATV. I'm fine with the tires, but we don't need Dr. Kel becoming a mechanic and actions becoming tedious like My Summer Car. I know that's an extreme example, but that game is a prime example of tedious game design.