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http://www.macnn.com/articles/01/09/10/auto/air.adapter/

Auto/Air Adapter for PowerBooks released

updated 09:40 am EDT, Mon September 10, 2001

 
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Lind Electronics has introduced a 60-watt Auto/Air Power Adapter specifically designed to power Apple's new iBooks and Titanium G4 laptops. The devices charge Apple notebooks from automobile 12 VDC or the airline in-seat power sources. Lind's new adapter is priced at $80, and includes a three year warranty.


by MacNN Staff

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  1. \0

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    09/10, 10:27am | report spam | Reply | delete

    Price

    Why is it that over the years, technology has gotten MUCH MUCH cheaper, yet these car adapters are still so expensive? Cell phone Car adapters are around $20, and it's nearly the exact same technilogy. Why is it these things are 4 times the price?

  1. Will C

    Mac Enthusiast

    Joined: Jan 2001

    0
    09/10, 01:48pm | report spam | Reply |

    Not quite the same

    In a cell phone adaptor, there is probably a voltage regulator, a few resitors and capacitors, power is probably only a watt or so - if the device is only 50%efficient, this is not much trouble, the excess power can be dumped as heat.
    Inside a 60W device, there are circuits to double the voltage and provide it at a couple of other voltages efficiently. If the device was only 50% efficient, it would have to dump another 60W, this means big heatsinks, crappy design etc etc - yep $80 seems alot, but it's not quite the same technology.

  1. Will C

    Mac Enthusiast

    Joined: Jan 2001

    0
    09/10, 01:55pm | report spam | Reply |

    Not quite the same

    In a cell phone adaptor, there is probably a voltage regulator, a few resitors and capacitors, power is probably only a watt or so - if the device is only 50%efficient, this is not much trouble, the excess power can be dumped as heat.
    Inside a 60W device, there are circuits to double the voltage and provide it at a couple of other voltages efficiently. If the device was only 50% efficient, it would have to dump another 60W, this means big heatsinks, crappy design etc etc - yep $80 seems alot, but it's not quite the same technology.

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