While I've read your list of inquires, I've not re-research them recently so don't have
any recent ideas or links to those information topics proven to still exist...
PowerBook G3 PRAM battery (clock) only:
http://www.newertech.com/products/pram_lombard.php
PowerBookMedic.com? G3 parts, battery?
You may have to locate custom battery rebuilder to replace cells inside case.
Powerbook G3 Rechargeable LI-ION Battery M7318?
The iLife question appears to mean your vintage/obsolete PowerBookG3 may be
able to use iLife 04; some features may balk, due to hardware + preference for G4.
iLife: System requirements - Apple Support
An early iWork on DVD media may be hard to get or install. AppleWorks 6.2 was good.
That may be available in earlier version on DVD media; not sure if any updates to older
Mac software are still available from Apple servers. ~ There are several discussions area
users who have older gear, but perhaps they haven't noticed this section for awhile.
PowerBook G3 repair guide (may show main battery part #)
https://www.ifixit.com/Device/PowerBook_G3_Lombard
You may be able to get an older iTunes player (some audio channels are free, still; as
is the ability to use the Player to control CD recording, if configured) see these links:
iTunes 9.2.1 is available for Mac OS X 10.4.11. iTunes 8.2.1 isn't available for G3 Macs.
My iBook G4 mid-2005 has iTunes 9.2.1 in Tiger. (+ later one for Leopard exists still.)
iWorks may have been available with Tiger. Mine didn't ship with it in 2005 Macs. The
version first out only had two applications. So I didn't use it; and still have AppleWorks.
A good word processor for ancient Macs in pre-X system was MS Word 5.1a. There are
newer ones that do fairly good if you look hard. The links to get them are disappearing.
If you have a full AppleWorks 6.0 you could see if this Apple Support download update
for AW 6.0 will work to update that to AppleWorks 6.2.9; can run in classic MacOS9.2.
//support.apple.com/kb/DL617?locale=en_US
If you happen across vintage orphaned old grey-label system install-restore DVDs you
may be able to extract and install some of their better items (examples to test include)
such as AppleWorks -- in various languages, & others; by use of Pacifist utility in OS X.
Rather than toss those into a bin to be lost, you could test old hardware with them.
See charlessoft site to check on what older Pacifist versions still exist. Used to work in
a demo mode, to extract software from compressed media and expand on desktop so
as to install without using the media installers. This requires experimental trial & error.
There isn't much available for the G3 PowerBook 400, you try Classilla browser from
the people behind TenFourFox browser; that sees some maintenance updates...
http://www.floodgap.com/software/tenfourfox/ looking for a web browser for Mac
OS 8.6-9.2.2 (and compatible with 10.1.5-10.3.9)? Try our sister project, Classilla.
Well, I could go on and waste this space; hopefully other users with vintage PB hardware
would see this thread by now. Hopeful some will -- sooner than later.
Good luck & happy computing! 🙂