I once had a phone with a removable back, and a special case designed to hold a massive battery in place without the back plate. Sucker was almost like a brick

I once had a phone with a removable back, and a special case designed to hold a massive battery in place without the back plate. Sucker was almost like a brick in your hand, but I've got huge hands, and I LOVED the fact that my battery would last for nearly a week with intense usage(I read books, like, all the freaking time on my phone)