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iBook Power Adapters - 65W or 45W
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Grizzled Veteran
Join Date: Sep 2001
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I thought that all Apple laptops now came with 65W power adapters....
Yet I am looking at the adapter that came with a 12.1" iBook (1.2Ghz), and it's a 45W adapter dated 2003.
Anyone know what gives?
Advantages/disadvantages of one over the other?
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Fresh-Faced Recruit
Join Date: May 2004
Location: Suburbs of Chicago
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It really wouldn't matter what adapter your iBook would use, as it will only draw the watts it needs to operate. For example, if you have a 65 watt adapter, obviously the output capability of that adapter would be a maximum of 65 watts. However, since an iBook only uses 45 (ish) watts, it will only draw the amount of power it needs from the higher rated adapter.
It works the same with a Dell, HP, etc... Most of the PC's using P4's use 90 Watt adapters, yet many makers use the same 90 Watt adapter to ship with their Centrino models that use only 60 or so watts, as they only draw the power they need.
That is my 2 cents.
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14" iBook, 1.33 GHz, 100gb, Combo, 768 MB, iCurve, & iRule
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Grizzled Veteran
Join Date: Sep 2001
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Interesting...so the iBooks -- even in their current incarnations -- only need 45W or so...yet the PowerBooks want to draw 65W?
I wonder why this is...
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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Because they need more power, that's why!
Mind you, the maximum power draw is only when the computer is in use AND charging the battery at the same time.
The 12" PowerBook also uses the 45W adapter. Only the 15" and 17" PowerBooks use the 65W adapter (beginning with the last round of TiBooks).
tooki
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Grizzled Veteran
Join Date: Sep 2001
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Originally posted by tooki:
Because they need more power, that's why!
Mind you, the maximum power draw is only when the computer is in use AND charging the battery at the same time.
The 12" PowerBook also uses the 45W adapter. Only the 15" and 17" PowerBooks use the 65W adapter (beginning with the last round of TiBooks).
tooki
Aha, therein lies my confusion. I didn't know that the 12" PowerBook also used the 45W adapter.
Makes sense, although it would be nice if they shipped 65W adapters across the board. I interchange adapters a lot between different laptops, so this means I'll have to be careful and keep this one with the iBook only and not use it with any of the large-size PowerBooks.
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Fresh-Faced Recruit
Join Date: May 2004
Location: Suburbs of Chicago
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Yeah, it would have been nice to ship 65w units with their entire line - it must be a cost issue. It probably save .50 cents per unit and allows them to recycle their older stock of adapters. I really have no idea, but it sounds viable. 
LK
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14" iBook, 1.33 GHz, 100gb, Combo, 768 MB, iCurve, & iRule
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Mac Elite
Join Date: Sep 2000
Location: Rochester, NY, USA
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You can use a the 45W power adaptor with a laptop that normally uses a 65W power adaptor if you're in a pinch, I've done it before with my wife's Gigabook. It won't burn anything out or anything like that. I wouldn't want to do a lot of work on with it, I certainly woudn't burn any CD's or DVD'd with the weaker supply, But you certainly ought to be able to do some light surfing while charging the battery using the smaller supply. And you definitely ought to be able to charge up the battery overnight with the weaker supply.
But Your Mileage May Vary, Use At Your Own Risk, etc... Future PB models may need that extra juice.
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Fresh-Faced Recruit
Join Date: Mar 2006
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I am New.
Read your thread with interest and hope that maybe one of you guys could help me.
I have an Apple 45W Power Adapter of the Dongguan Samsung make Model No. M7332
The part number marked on the adapter
is PSCV 450 109A
QAS TE4710
Could you possibly advise me of the connections of the output cable to the shrouded stereo type jack i.e. tip; ring; sleeve and shroud.
I do know that the inner cable carries 24v D.C. and that the shroud is connected to the cable overlay braiding by a 500K resister.
I am not sure where the cable or the braiding connects to. Can you help or point me in a direction to get this information?
I took the original jack to pieces and it became un-reusable in the process. I have now modified a standard stereo jack to suit and am all ready to solder up and affect a full repair. I did make notes of what was connected to what when disassembling, but it was connected in such a peculiar manner that I wanted some confirmation of these connections.
I have even tried to pick up voltage signals from the battery by plugging in a spare stereo jack with flying leads to the socket on the ibook and probing with my test meter, but they have obviously put diodes on these inputs to prevent any reverse outputs, and so no signal is obtainable. With a lot of other manufacturers a circuit diagram would even be available, which would solve the problem in an instant - but apparently not Apple.
Regards Thogebu
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