We have a gateway laptop. The power supply label says it puts out AC to
the laptop. Thus, we can assume the laptop itself does the rectifying,
etc. to supply the internal electronics and keep the battery charged.
That said, is there much to be gained by getting a "car plug" power supply
over just plugging the existing power supply into once of those cheap
converters to 120 volts from "car power."
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- posted 14 years ago