The worst part about a non-removable battery, besides no replacement, is if the phone is dropped. The battery usually ejects and takes the force of the fall. I

The worst part about a non-removable battery, besides no replacement, is if the phone is dropped. The battery usually ejects and takes the force of the fall. I have never had a phone case and have dropped my 3 droids many times without incident. With case, you lose a lot of the sleekness.