Ford

I have driven 6600 miles in my new ford escape hybrid that i have owned since january. in the last week, even today when the weather was beautiful, i have not had the hv battery go in at all even on long trips, being idle, or going 5mph. two weeks ago my battery was always kicking in and i got 37 mpg all the way. why all of a sudden is my battery not working? im not using any climate control, and i have nt been driving any differently. even when im going 5mph the engine is at 1000 rpm

Are there any lights on? if the weather is hot there it could be because the a/c will run and cool the hybrid battery in the rear of the vehicle. when you first start it does it idle for a couple of minutes and shut off? does it shut the engine off when you come to a stop?