I have to say that I am disappointed. I wanted to love iFixit as a company, but after purchasing several MacBook batteries for them to replace my original one that failed, I can't say that these are quality products. I know that they just don't make things like they used to (I got very lucky in that my original mid-2011 battery lasted me for almost 8 years), but after initially buying a battery from them, it swelled up and died in less than a year. I contacted them and after running different tests, they promptly replaced it as they agreed it was defective/it was still under warranty. This was great! However, the replacement battery has now started to have issues after about a year and a half of use. I have done the same diagnostic tests that I did for my original one and can confirm I will indeed have to replace it again... But is this really life now? Will I just be buying replacement batteries every 1-2 years? I heard good reviews about this company and expected more. I don't feel it's unreasonable to expect a product to last more than 2 years, but if it is... yikes: -/