My Lenovo Yoga C930 laptop became suddenly unusably slow, and after a month of troubleshooting with software, I was looking into a replacement on iFixit. Couldn't find the model of laptop I have, so decided to try a new battery/charging cord first and I'm very glad that I did! I am not very tech-savvy and was overwhelmed by the idea of tinkering with my hardware, but the toolkit and comments in the picture guide for battery replacement helped. I did end up finding a video online because I needed to see more detail since I was nervous about how much force to use in getting things apart, but iFixit definitely gave me the confidence to do something new that I would have not otherwise had access to do. I'm still no whiz, but knowing that this site and community of people with shared values exists is a reassurance.