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A.Goldberg

macrumors 68030
Original poster
Jan 31, 2015
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A TiBook running OS X 10.4 (w/o classic mode on)

or

A TiBook running OS 9.2

Assume that it is the same TiBook.
 
That is obviously going to depend on CPU load, application choice, etc.

Well yes, but generally speaking, I guess my question could be rephrased, "Is OS 9 innately more or less efficient than OS X?"

This is assuming all things equal as possible, aside from the OS. For example... watching a DVD. Or watching the same quicktime video. Or doing the same tasks in Office 2001 in OS9 vs. Office v.X in OS X (as they're quite similar).
 
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My TiBook's fan comes on much more frequently in OS X than in OS 9. I would presume that anything causing it to heat up enough to spin up the fan is likely also causing it to use up the battery faster.

Although my battery has a problem where it will spontaneously drop from ~30% to 0%, but not predictably enough that I can tell for sure when it's going to die. (Sometimes it drops at 33%, sometimes it gets as low as 25% before it dies.)
 
Considering "Classic" when inactive/idle will "sleep" itself, battery life will remain similar to OS 9/X but some OS 9 applications are prone to more battery drain than OS X native--that is my observation on my 2003/2004 PB G4s. If you use more OS 8-9 era software, better to keep a spare Mac just for that task alone.

Remember Classic doesn't allow direct access to certain hardware/chipsets so your mileage varies with older software, in my experience some older IDE/PATA to USB 1.1 bridgeboards can't have the HDD formatted to HFS+ with journaling but hybrid USB 1.1+FW400(Oxford chipsets) don't have this issue with Classic.
 
Sounds like you have dead cells in your battery.

Probably. I've been tempted to buy an aftermarket battery, but all the high-capacity ones I see are either insanely overpriced, or have some terrible reviews. (Like "this battery stopped working after one month" terrible.)
 
Probably. I've been tempted to buy an aftermarket battery, but all the high-capacity ones I see are either insanely overpriced, or have some terrible reviews. (Like "this battery stopped working after one month" terrible.)

I would go for a standard capacity Chinese battery. There are tons for the Aluminum PowerBooks, but I can imagine that TiBook batteries are much harder to find.
 
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