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problem with a powerbook battery

Message #1 - Posted 2003/06/09 - Clark Martin

Previously, henri delebecque wrote:

hello,

I have a powerbook G3 400MHz, not firewire (Bronze keyboard), that refuse to charge its battery:

Tatltetech teels me that:

the charger is on,
the battery installed,
the battery level is 12,6V (that's wrong, it is empty) the battery is not charging.

I have tried to zap the PRAM, and reset the power manager.

Is my battery dead ?
If so, why does the powerbook syas that it is fully charged ?

Frequently when batteries die they will charge up to their nominal fully charged voltage but they don't actually hold much charge. So it will act normal except that it usually charges real fast and it discharges real fast to. The voltage starts off low and reaches the normal value, it's just the time element that is different. The discharge time can be extremely short, seconds.

It sounds like your battery is dead.

Clark Martin
Redwood City, CA, USA Macintosh / Internet Consulting

"I'm a designated driver on the Information Super Highway"

Message #2 - Posted 2003/06/14 - Jennifer Mullen

In <3EE5C8FF.696BED1@supelec.frNOSPAM>
henri delebecque wrote:

I think that I have to be more precise:
When I say that tattletech says that (the voltage is
12.6V and) the actual battery voltage is 0, I mean that the battery level dispayed by the mac is 0v.

This happend to my PowerBook (Lombard) a few weeks back. Booting into Open Firmware (command-option-O-F) and resetting nvram fixed it - as soon as I reset nvram, the lights on the battery came back on. The relevant OF commands:

reset-nvram
reset-all
bye

That last, depending on your model, could be "mac-boot" instead of "bye".

J.

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