Besides the speed of delivery, it should be noted that the battery is supplied with the screwdrivers needed for disassembly (thank you is nice). It takes away the 10 screws from the bottom of the MacBook, the 3 screws holding the battery and the new by replacing is removed. Just go up and you're done Overall max 10 minutes to do it. Note that before the change of battery on my 2009 Macbook Pro 13 inch, he paddled and had become unusable (worse than EEPC). Since I found my Mac!
Battery is of excellent quality, in a few months to see if that life is as great as the original.
In any case, even for someone who counselor knows nothing.