I am thinking about purchasing the Droid X extended battery and I'm thinking of keeping the stock battery in the car. I'm just worried because cell phone batteries aren't the safest. The hottest it'll get here is about 100 degrees (110 inside the car) and the coolest 12 degrees (around 0 inside the car). Are these temperatures too extreme for the battery or is it okay to keep in the car? Thank you, Kenneth EDIT- Darn I meant to put this in the accessories forum.