Charging behavior were being lousy: leaving it plugged in most of some time. This is certainly what I believe resulted in the original battery swelling. These older MPBs and MacOS's did not hold the enhanced charging now provided by Apple. 知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 EDIT: Jaybrokers is a little shady because https://chickx808lex3.signalwiki.com/user