Mac travel tip: car power for your MacBook Pro
For all the wonders of the MagSafe connector -- scores of marriages saved and pets kept from the pound, as laptops that would have otherwise experienced impromptu gravity testing remained happily on stable surfaces -- there's been a remarkable gap in the charger offerings for Apple laptops since its introduction: no sanctioned car chargers. This is a point of contention for those of us who use our laptops as DIY entertainment centers on long trips, and has led to some family tensions in my household ("Why do the kids have to watch DVDs on MY machine?!?").
MCT does offer a homebrew solution that grafts a MagSafe connector onto a Kensington AC/DC adapter for universal chargeability, but at a fairly steep price; the basic conversion of a MacBook or MBP adapter to work with a DC transformer is cheaper, but still a little scary. With these limitations in mind, I went for a somewhat more traditional solution: an inexpensive, 96-watt inverter (DC to AC converter; I got mine for $10 on woot.com but there are other models and other deals) coupled with the lowest-wattage adapter available that would still run my MacBook Pro. In this instance, that's the 60-watt MacBook adapter, which runs and charges the MBP under all but the heaviest load and also is substantially smaller than the 'big brick' MBP adapter; works like a charm in my car. If you get a second charger for home use, might as well make it the MB adapter and add the inverter for mobile fun.
DISCLAIMER: Any use of an inverter, off-spec or off-brand power adapter, or other unofficial charger is at your own risk. I Am Not An Electrical Engineer.
