How to Replace a MacBook Battery (5 Steps)

Turn your MacBook upside down, with the Apple logo facing downward. Check the bottom panel for a removable battery. If the bottom panel is a solid block, you have a 'uni-body' MacBook, and the battery can only be replaced by an Apple authorized service technician.
Purchase a replacement battery from an Apple Store, an Apple authorized reseller or a third-party manufacturer. Be certain to purchase a battery specific to your MacBook model. Batteries made for other MacBooks may not fit in the case or may supply the wrong amount of power.
Use a coin to turn the circular lock slot of the battery clockwise 90 degrees, or one-quarter turn. The battery will pop out slightly, allowing you to lift it by its case out of the battery well.
Insert the new battery in the same orientation that the original battery was placed, lining up its connector with the power jack in the MacBook.
Press the battery gently and turn the lock slot counterclockwise to lock the battery in position.
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How to Transfer From a PC to an iMac

Write down a list of applications you can't do without. In many cases, you will need to find a different program, since many Windows PC programs aren't made for the iMac. Making this list ahead of time allows you to purchase software you need when you purchase your iMac, which will cut down on the time it takes to get your new computer environment up and running. Many programs, such as Microsoft Office, have a version for Mac. In most cases, Mac has a suitable replacement program for just about any Windows software you need.
Back up all of your important files on a CD-R. Burn them onto a disc from your PC before you begin setting up on your iMac. This includes any documents, images, or music you will want to transfer. IMac reads all the common files that a PC can read, including text, rich text, JPEG, MP3 and PDF files. You will be able to transfer those files directly. If you have Microsoft Word or Excel files, Apple's iWork will read and write these files, although the software will need to be purchased separately (unless you purchase Microsoft Office for Mac).
Open 'Finder' on your iMac, click the 'Task' button located along the top of the window, and click 'New Folder' to create folders with the same names you're familiar with on your PC. Many of the same default folders already exist on the iMac, including 'Pictures,' 'Movies' and 'Music.'
Insert the disc that contains all of your backed up documents, images and music files from your PC. The disc will open automatically. Select the files using the holding down the 'Shift' key and clicking the files you want to move. Open the appropriate folder in 'Finder' and drag your files to the folder.
Check all of your files to ensure they can be opened on your iMac and edited. Make a list of those that you can't access (the list will be limited). Install any software on your iMac you need to get back into working on your computer without disruption.
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