I reported last week that my MacBook Pro battery was suffering from the 33 percent battery bug. That's where the MacBook Pro completely shuts down (without warning) when the battery gets down to less than 33 percent capacity.

I received my replacement battery from Apple last night and it's from a completely new serial number range.

My bad battery SN began with: 6N606
My replacement SN begins with: KF619

I'm curious to hear what other people's battery serial numbers are (post them in the comments) and if newly shipping MBP batteries are also from the "KF" serial number range.

If you're a new MacBook or MBP owner (or if you've received a new battery) keep in mind that there's a special procedure to calibrate new notebook batteries.

1. Fully charge the new battery until the LED on the power adapter plug changes to green and the battery meter in the menu bar reads 100 percent.

2. Allow the battery to "rest" in the fully charged state for at least two hours. You can use computer during this period as long as the adapter is plugged in.

3. Disconnect the power adapter and run the battery all the way down (while using it.) Save and close everything before the final warning.

4. Turn off the computer or allow it to sleep for five hours or more.

5. Connect the power adapter and leave it connected until the battery is fully charged again.

If you're looking for a good way to monitor your MacBook or MBP battery, check out coconutBattery v2.2 a freeware utility that displays the current and maximum charge of your battery, current and original battery capacity and the number of battery loadcycles (how often you charged the battery).