Why do people say its better for batteries to keep them in the range from 20% to 80%?

Question

I have just seen a post about battery usage and how batteries actually get weaker each loading cycle. Also, I have heard that batteries should be kept in the range from 20% to 80% since its better for their durability. It seems to me that these facts refute each other. So how are both of them true apparantly?

In: 5

Answer 1

Look up “memory effect” in batteries. I think it only effects some, not all, types of batteries.