Is this replacement battery band new? Does the power adapter end change from green to orange when plugged in?
I would rest the PMU first and see if that resolves the problem. To do that follow these instructions:
Thank you for your advice.
The battery is brand new but is not an Apple battery so I may have bought a lemon on Amazon.
The charger does change to orange when plugged in.
The battery has charged while installed.
I reset the PMU following the directions on the webpage you suggested.
I still see the battery icon and a 0% indication.
Very odd, as if your power adapter has gone orange it must be charging the battery.
I assume you have left it for a while on charge? if so have you also tried powering the PowerBook on the battery after it has been left on charge for a while?
But if it doesn't work then I would agree, it sounds like a dud battery and your be best to exchange it.
Best of luck