chargers/batteries I currently have a moto q9c with the extended battery however sometimes I find that my battery does not last me the full day if I am using it alot so i am looking for another option. I am not normally in my car so a car charger probably wont be my answer but Im thinking of picking up another battery or possible some sort of device that will allow me to charge my phone on the go. Im not sure if i want another battery since I will have to charge it through the phone but maybe this would be fine. I saw on sprints website they sell a device that will give you about 2 full charges and you just plug your phone into it. has anyone used one of these? how well do they work? can you see how much power is left in it? Any suggestions?