PB520C Battery Issues

[Display Name]

I decided recently to rebuild a couple of batteries for some of my old Macs, and the one for the 520C simply does not work. The battery is detected and its battery remaining shown, but when the AC adapter is unplugged, a message pops up saying "No reserve battery power remaining" and the PowerBook goes on standby 10 seconds later.  I have attached a picture with one of the multimeter readings, and I have already attempted to reset the power manager (although I could be doing it wrong, so confirming how to do it would be welcome). Could anyone help?

Important note: I am an amateur with amateur resources to make this battery, so the entire thing could be made incorrectly. If the symptoms listed point toward this conclusion, please tell me.

View attachment IMG_0777.HEIC

 

[beachycove]

See if you can find my post from years ago on a 540c battery rebuild. It didn’t work at first either, but there are some suggestions in that thread.

 

[Display Name]

See if you can find my post from years ago on a 540c battery rebuild. It didn’t work at first either, but there are some suggestions in that thread.

Thank you for recommending me to these posts. I found a battery recondition software somewhere, and now my battery works as it should. (The keyboard on the unit doesn't work, however, and near it on the logic board is some corrosion; could this have caused a broken trace?)

 

[beachycove]

I'd say check/ reseat the ribbon carefully, and  clean the logic board (iso alcohol would do).