The battery appears to have expired.
Better quality replacement batteries can be found from a few sources
online; or you can take your chances with a walmart clone.
I bought replacement from OWC macsales.com, battery for 12-inch
G4 iBook (mid-2005 model) & was made by NewerTech. About $88.
You could try this to see if the hardware responds:
• Resetting PowerBook and iBook Power Management Unit (PMU) - Apple Support
And/or PRAM (NVRAM) reset:
• How to reset NVRAM on your Mac - Apple Support
A replacement battery, no matter the source, would require a calibration
routine to be performed and then after it seems stable (and reliable) you
can later calibrate the battery per cyclic-use factor they suggest in their
guide online. The newertech battery has better power over its life; and
has fairly good guarantee via OWC.
Here is a link to their suggested (and if you get their battery, & expect a
warranty, you will perform the calibration before use ~ and before any
warranty submission acceptance by them) process for setup and use...
•Initial Charge, Discharge, Recharge + Ongoing battery usage, storage, conditioning:
https://eshop.macsales.com/Reviews/Framework.cfm?page=hardwareandnews/newerbatte ries/newerbatteryconditioning.html
The example of recommended battery (they offer different part number for
the 14-inch iBook; it has slightly more storage capacity) from OWC is here:
An original quality power adapter with green/amber light is hard to come by
but there are good quality third-party adapters without indicator light in cord.
Another point of issue may be the DC-in Board ~ a circuit-board in the iBook;
if the adapter, battery and other hardware is known good, this may be bad...
Some ideas on what this takes to replace can be found in the iFixit.com repair
guides for Mac, for portable computers. Difficulty: great. Tedium: extreme.
Good luck & happy trails! 🙂
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