macbook turns off/sending to Applecare

[hana]

Okay...this is a multi parter

1. Macbook (the original 2GHz Intel Core Duo 667mhz with 2 gb ram) has been upgraded to Leopard. When I just run it on the battery, around the time when it has 30 minutes left (yes, I drain the battery monthly), it just spontaneously turns the power off. No warning, no reserve power.

2. Yes, I did, when I looked at console, see this
10/28/07 1:06:33 AM com.apple.launchd[1] (com.apple.dyld) Throttling respawn: Will start in 59 seconds
and ran this in terminal
update_prebinding -force -root /

3. Tried to use the Macbook again with battery only. Did the same spontaneous power off thing.

4. Updated to 10.5.1 - still happening.

SO....any ideas on what to do?

NOW....if I need to send this to AppleCare (since I never have sent this to AppleCare) what steps/precautions should I take? (this Macbook also has browning so it's due to go to AppleCare) ????
a. I have two admin accounts on the Mac - is it okay if I just give AppleCare access to the one I don't use often? I don't want accessing some of the stuff on the admin account I use most of the time.
b. Do you suggest that I back up the Macbook using Time Machine (never ran it, never connected it) or just use back up?
c. Any other precautions to take before sending MacBook to apple care?

Thanks for reading!

 

[NOsquid]

Is it doing predictably at the 30min mark? That's more an annoyance than a problem, I wouldn't send my computer away for it. If it's unpredictable, you might be in for a doozie

http://www.appleinsider.com/article...k_owners_organizing_class_action_lawsuit.html

I came across that by chance when I was Googling the logic board issues with iBooks.