I've seen warnings that I should only use the charger that came in the box with the Droid Maxx. I'd like to know what specs I should look for when purchasing additional wall chargers and/or car chargers. I've heard that using the wrong type of charger can actually damage the battery. Is that true or will it just not charge it as fast? I have several chargers from my Droid Bionic I'd like to be able to use if possible, but I love the battery life on my new phone and don't want to damage it. Thanks!