Ibook 14" shuts down 50% battery

[mcprodriver]

Purchased this notebook used, but very nicely cared for, excellent condition. I ran the Apple Hardware Test and everything passed including the logic board.
The battery has 500+cycles. The problem is laptop shuts down at 50% or less of battery. Clock is wrong at startup but is correct a few seconds later.
Runs forever and very nicely on ac power.

Please advise.

[me_94501]

Originally Posted by mcprodriver

Purchased this notebook used, but very nicely cared for, excellent condition. I ran the Apple Hardware Test and everything passed including the logic board.
The battery has 500+cycles. The problem is laptop shuts down at 50% or less of battery. Clock is wrong at startup but is correct a few seconds later.
Runs forever and very nicely on ac power.

Please advise.

You probably just need to replace the battery. Unfortunately they're not cheap.

And assuming you're always online, the clock adjusting itself is due to the computer syncing with an internet time server (usually time.apple.com).