You can pay up to apple and have a guarantee that it will last, or you can shop around for a generic replacement. I try to save money vs lining the pockets of the name brands like Apple who have what i feel are deep pockets. If buying a generic replacement, do research to see if others gave positive feedback on it such as 2 of 5 stars being bad and 4 of 5 or 5 of 5 being worth taking a chance. There are usually big savings when buying generic vs Apple Branded or Certified parts, and if you do the research you can be successful at a good replacement battery and saving money.
