Hi friends, I am wondering if anyone finds this odd. I live in Columbus, OH. Weather has been 70-85 degrees lately, not much humidity. The past week I have noticed my battery cooling fan running constantly on all highway trips - 20 mile one-way trips going 65-70MPH. The performance of the battery doesn't seem be degraded, but it SEEMS like the battery is hopping more between charging cycle [or whatever you would call it - where you watch the instantaneous MPG on the highway drop down for 10 seconds to 40-50, then back up to 60-70]. The car is a 2011 Prius III. It did not run like this earlier in the summer in the same weather conditions, I would hear the fan maybe once every few weeks in hot 90 degree weather. Now I hear it constantly. This is my first summer owning the Prius so this may be normal, but I wanted to double check with you all if this is a sign of pre-mature traction battery death or something. Hearing the constant buzz of the fan in the back is also quite annoying (sounds like a rear window is rolled down) when you want to just have silence inside the cabin.