iBook Battery Might Be Defective?

Ok, so I got an iBook G3 900MHz 14" from CraigsList on June 28th. Met up with the guy. Very nice person, and a great transaction. iBook is flawless. Had a new battery.

Day 1: So, I take it home, and I plug it in to charge. I go ahead and want to see the life of the battery with Coconut Battery. Ok. 99% of original capacity. Good!

Day 2: So now, I use it for a day, and it dies, so I charge it. And I use it again.

Day 3: After charging, I look at Coconut Battery. What?! Two days, and the battery life is down to 80%?!

So here is some stats. Each of these is after a full charge and drain)
June 28th - 99% (mAh Unknown)
June 29th - ??% (mAh Unknown)
June 30th - 80% (3232 mAh)
July 1st - 74% (2976 mAh) - Morning
July 1st - 68% (2720 mAh) - Evening
July 2nd - 64% (2587 mAh) - Half hour ago.

Should I take it in to an Apple Store? Can I get a new one?
There are 1 year warranties on these, right?

Thank you.
- Devin

iShater said:

When you say "new" battery, is it one that person bought from Apple? do you have the paperwork? how old is it?

Click to expand...

New from Apple, yes.
I do not have paperwork, no. I might be able to cal him and ask tomorrow.
Will I need it to get a replacement? I didn't for my iPod Touch(s).

Yes. I let it die, and charged it all the way to 100%.

Max Capacity.

I will. I won't be able to go to an Apple Store for a few days anyway.
I just hope it doesn't get all the way down to 0% by then.

Will I need paperwork or receipts to get a new one, or can they see when it was purchased to see if I'm eligible or a new one through the warranty?

Can somebody please answer my above questions?
"Will I need paperwork or receipts to get a new one, or can they see when it was purchased to see if I'm eligible or a new one through the warranty?"

Thanks.