My iPad mini turns off by itself all the time. Why is this happening and how can I fix it?

My iPad mini turns off by itself all the time. Why is this happening and how can I fix it?
Added (1). My iPad mini shuts off by itself all the time no matter what the battery level is at. I force close all the apps too. You can just unlock it and it will shut itself off. If you walk with it, shuts off. Move it, shuts off. Sometimes you can just be watching a movie and it shuts off. Why is this happening and how can I stop it from doing so?

Read more: My iPad mini turns off by itself all the time. Why is this happening and how can I fix it?

My mom bought me an iPad when her and my dad divorced, I have never used it and it's gathering dust. Is it okay to sell it? I feel bad?

My mom bought me an iPad when her and my dad divorced, I have never used it and it's gathering dust. Is it okay to sell it? I feel bad?

Read more: My mom bought me an iPad when her and my dad divorced, I have never used it and it's gathering dust. Is it okay to sell it? I feel bad?