Iphone back cover drains battery?

I bought a plastic transparent back cover for iphone 4s. When I put that on the battery wastes really fast. Can anyone please tell me what could be the problem here?

Definalty not the back covers problem… Maybe your battery is going bad? The iPhone 4s has a terrible battery life in general anyways.

It's possible. It could make your phone overheat and drain the battery faster. Also depends on the apps you are using. Iphone battery sucks anyway. I'm an iphone 5 user.

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