I have bought the Energizer AP1201 Power Skin for iphone 4 a week ago; I have decided to return it as I find it useless. All the other models I have seen have a switch, which allows you to turn it off when it is fully charged and to turn it back on when the inbuilt battery of your phone is getting low. Because this one does not have a switch, it remains on all the time and it dies in one or two hours and consequently you end up have a second battery attached, which is most of the time flat. I can’t believe Energizer can come up with such a useless product.
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