Where does coconutBattery get their numbers from?

https://preview.redd.it/0g5mewz0ugce1.png?width=512&format=png&auto=webp&s=7b7430bd32cbc51f82c3d4d1e23201d0911817ac https://preview.redd.it/3zvf0mtcugce1.png?width=972&format=png&auto=webp&s=da30f1d3b9082f2f3104556e2e0f2438c529d7cc They seem different than the ones MacOS displays. Which one's more accurate?