Already replaced my battery cover. The notch used to remove it separated. Apparently there are two layers of material. The replacement was different. (Not "carbon fiber" but looks better and is smoother. I don;t use case covers or screen protectors so it really slips well into and out of my pocket. It is really slim.
The battery cover when attached is not noticeable. And since we only keep these phones for a year or two, it doesn't matter if its built like a tank and just as heavy,
