I've been using a car cigarette lighter charger on my phone fairly regularly. It was the cheapest dual usb charger i could find so I'm a little worried that it might not be providing the correct amperage/voltage, and could harm my battery over time. I'm also usually splitting the cigarette lighter to my GPS at the same time if that matters. Anyone know Anything about this? I have Droid RAZR and the charger that came with it is 5.1V, 750mA. I think my car charger is ~1.2mA (I'm assuming because of the two usb inputs). If you think I should stop using this charger, can anyone recommend one?