Found some odd readings with Coconut Battery for my Powerbook

Hey Looks to me like your batterie is dead however you say powerbook and I was able to get a replacement for free from apple look here -> https://depot.info.apple.com/batteryexchange/index.html

it depends what type of model you're running, etc...you don't just get a change just like that. I'm not sure about Coconut Battery but the last time I checked, it was pretty inacurate.