PowerBook works on power, but neither battery charges?
PowerBook sat unused for many months and both batteries I have discharged. Initially one battery charged fully but discharged and didn't come back. Other battery won't charge either. Shows o% charge. Light glows amber as if to show charging. As I have two batteries each about 3 years old I tend to think it isn't the batteries. PowerBook works fine while plugged in to power. Thanks for any help you can give.