Level block: 3 blocks (0~8)
Does the number 3 mean the battery is bad because it's way lower than 8?
I looked it up and now I know what to look at haha. What's important is the range of blocks (0~8). My phone battery is currently at block 3 which shows the space which the charge (26%) currently occupies.
Thanks for this informative post which saved me from worrying I might need an upgrade. This phone has been with me since 2016 and am not replacing it unless it's really broken. It's still in good shape.