I have one electrical outlet charger for my home and one for work. Between the two the phone is always charged. I like my front area clean of clutter, incl. wires.

We had a similar problem to yours re: power to the kids DVD player on long trips. They don't get the player for any drive less than 2 hrs.
Our solution was to have a charged power pack battery with the attached jumper cables. It has a cig outlet to power accessories.

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85' 300D No inspection, No registration fees, Cheap insurance
"If my calculations are correct, when this baby hits 88 miles per hour, you're going to see some serious %$&^."