This is the Battery Reset 2.0 software Apple released to fix issues
with the batteries in G3 series PowerBooks and iBooks not being
recognized in software. I pulled this from the internet archive, on a
support page that no longer exists on Apple's website.

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1st Download:
North American English Mac OS 8.1 or later - released 1999-11-02 -
version 2.0

2nd Download:
Japanese Mac OS 8.1 or later - released 2000-02-10 - version 2.0

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Below is the description from the page on Apple's website, which also
serves as the Read Me. The URL for this page was:
<http://docs.info.apple.com/article.html?artnum=60655>

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North American English

Important Information About Battery Reset 2.0

What Is Battery Reset 2.0?

Battery Reset 2.0 addresses a situation that may occur with some
PowerBook G3 Series and iBook computers in which the battery, while in
the system, doesn't show up in the Control Strip, or a red X appears
over the battery icon in the menu bar.

Battery Reset 2.0 includes two components. For PowerBook G3 Series
computers, a file called "Battery Updater" is installed in the
Extensions folder and an application called "Battery Reset" is
installed on your hard disk. For iBook, only the file called "Battery
Updater" is needed and is installed in the Extensions folder.

Installation Requirements

To install and use the Battery Reset 2.0 software, you need the
following:

A PowerBook G3 Series (family number M4753 or M5343) or iBook (family
number M2453) computer. The family number is located on the label on
the bottom of the computer.
Mac OS 8.1 or later installed

Installing Battery Reset 2.0

1\. Double-click the Install Battery Reset 2.0 icon to install the
necessary software.
2\. Restart the computer.

iBook owners: Your system is updated and your battery should recharge
normally when your power adapter is plugged in.

PowerBook G3 Series owners: Make sure your PowerBook is plugged into
an AC power outlet and continue with the instructions in the next
section, "Using the Battery Reset Application."

After you restart with the Battery Updater extension installed on a
PowerBook G3 Series computer, some system settings (such as time zone,
key repeat rate, and alert sound) will be reset. If you have
customized these settings, you need to open the appropriate control
panel and reset them after completing the reset operation.
After installing the extension on a PowerBook G3 Series computer, your
AppleTalk Ethernet connections may be disrupted. If this happens, open
the AppleTalk control panel, choose Modem/Printer Port from the
"Connect via" pop-up menu, then switch back to Ethernet and close the
control panel.

Using the Battery Reset Application

The reset application is designed for PowerBook G3 Series batteries
only. The reset application is not necessary on iBook computers.

1\. Make sure the PowerBook is plugged into a working AC power outlet.
2\. Insert the battery in either expansion bay, if it isn't already
inserted. The Battery Reset application opens automatically on
restart. You are given a choice of resetting just the left battery,
just the right battery, or both batteries (if two batteries are
inserted).
3\. Make a selection and click the OK button. You are asked to confirm
that AC power is connected and that you want to proceed with battery
reset.
4\. Click the Reset button to repair the battery.
5\. After the battery has been reset, eject the battery and reinsert
it to begin charging.
6\. The battery is charging normally if a lightning bolt appears on
the battery icon in the menu bar or Control Strip while the system is
plugged into an AC power outlet. If the battery does not begin
charging within a minute or two, remove the other battery (if there is
one) and wait another minute. If the battery still does not begin
charging, run the application a second time.

Note: Using the Battery Reset application will deplete the battery.
You must fully charge the battery before using it again so that it can
recalibrate.

The Battery Reset application is installed in the Utilities folder on
PowerBook G3 Series, if needed in the future.

Compatibility
Architecture: PPC

Only for use on a PowerBook G3 Series (family number M4753 or M5343)
or iBook (family number M2453) computer. The family number is located
on the label on the bottom of the computer. Mac OS 8.1 or later
installed