I have a basic 510 kit and drive about 45 min. each way.  And of course I run out of juice after a bit.  What is the best solution? Cart? Box?  I have tried prefilling my atty's but somehow I either over fill and get a mouthful, or it is too dry.  So you know what I am doing, and I am becoming a traffic hazard.(I am sorry officer, I am trying to quit smoking, I wasn't talking on the phone...)