ipod question: when riding and listening to MP3 or ipod, do you use a charger while playing it? The charge does not last more than a day on either of mine, so we've been using my phone charger since it fits. We plug one end into the player and the 12 volt plug into the receptacle. This seems to work, however, everytime we stop, the player begins at the same song, so we never get past very many songs unless we're on an all day ride. Then the next time we start back up, it begins in the same place again. The particular player does not have a shuffle or I would have tried that. Any suggestions for this and is it okay to keep it plugged up to 12 volt? Thanks.