MacBook Shuts Down when I Remove the Adapter

It all started a couple of days ago when I was watching a DVD. I bumped the adapter and the laptop shut off. Thinking I missed the Low Battery message I plugged it in and rebooted all good and I left it plugged in not noticing what color the LED was on the cord. Since I was on vacation I decided to drop in to the Apple Store in Philly to get a tour of Leopard, I liked it so much I bought it that day and did a clean install to 10.5.1 from 10.4.11 when I got home. When I was all finished I unplugged the adapter and rebooted because the adapter said the battery was charged. On reboot everything came on and then shut off after a second. I had noticed too my adapter sometimes would show green when the battery was dead (weeks before my upgrade) but then I would unplug the adapter from the laptop and plug it back in again and all systems were a go. I had Googled the problem to see if any other person had this problem and found there were quite a few cases of this and that Apple seemed to be having problems with their batteries. I did try to download the Battery update 1.2 and to no avail. I have tried to reset the PMU and the PRAM but to no satisfaction either. I haven't found anything on the Apple website to tell me how to find out about the battery problem except some folks that have been having the same problem, in my Google search it said Apple was handing out replacement batteries for defective ones made between curtain dates. I don't know were to go from here, I bought the laptop in 2006 but I don't have a receipt for proof of purchase if it is the battery...... HELP!!!

Ok I gained a little ground on the subject. First I downloaded iStat Pro (freeware) from iSlayer.com to see if the computers logic was fried, I figured that if the logic was bad iStat would give me the same reading of battery condition as MacOS did. Alas! iStat gave me a different reading than MacOS so that narrowed the problem down to the battery itself. My battery health was at 79% and it was only 96% charged although MacOS said 100%. So I started a slow battery drain so that I would not cause gross amounts of heat as it discharged (in case it was damaged) in Sleep mode. The first time I tried this I went to the Apple Menu, put the laptop in to Sleep Mode and shut the lid. All was good until I unplugged the MagSafe adapter from the laptop and it did a hard shutdown. So after a few trial and errors I simply closed the lid and unplugged the MagSafe adapter from the laptop and Hoorrah it worked! It was sleeping on the battery power. When I reopened the lid though it did a hard shutdown. I decided to start again and booted with the adapter plugged into the laptop, shut the lid after startup was finished and unplugged, all good. Also a good reminder here, I waited 1 Minute after shutting the lid to unplug the adapter, if I did it before that it would do another annoying hard shutdown. After all of this I let the battery flounder for a while in Sleep Mode probably 2 hours and opened it back up again. To my disappointment another hard shutdown, but when I plugged in the MagSafe adapter it went orange like it was charging Woohoo grrrrrreat! I rebooted and the Icon on the bar showed it was charging but did a hard shutdown again when I unplugged the MagSafe adapter from the laptop. Rebooting one more time I let the battery charge until it showed 100% charge, iStat confirmed it and I closed my eyes and unplugged the adapter from the laptop. Nothing happened, it was running off of the battery with a battery health of 84% from iStat. So now here I am doing this on battery!! If you try this you may want to try to run the battery down a little at a time and then recharge it (if this works for you at all), a little more every time until it is dead so that you gradually discharge the battery and don't kill it by chance the first time around. Download iStat its a great utility widget. I am on my 235th charge cycle on this battery and I am gaining ground on the battery health by doing what I explained above. Also remember that macbook batteries like to be totally discharged (empty) before recharge. I will keep posting with my results.

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