just got my droid x a few days ago. i'm coming from a G'zOne Rock basic phone. i'm already noticing there is a huge difference in battery life (as there should be). i could go several days without a charge using my g'zone for talking and texting. i've had to charge my droid x every night so far. i figured i should go ahead and grab a car charger for when i'm out and my battery gets low. i've always heard car chargers are hard on the battery and will shorten their life. is this still the case with newer phones and chargers? how do you guys use car chargers? and have you noticed a negative impact on your battery life since using one?