I gave a friend my old 2014 MacBook Pro and got myself a new one. I loved the machine, but she needed one. A week after she had it, she spilled a glass of water on it. After drying it out, it worked fine, but wouldn’t run from, or charge the battery. Most people suggested it needed an new $700+ logic board, but a few suggested I start with just a battery replacement. So I bought the kit from Ifixit. The kit was complete with everything I needed. The step by step instructions were clear and easy to follow. And best of all the battery replacement alone has the machine working as good as new for only $99.