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  • Answer

    No, you can charge them separately or together with the included Boostcase charge cable.

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  • I can charge the Boostcase separately or with the phone attached. As soon as I attach the phone the Boostcase battery seems to "empty" whatever energy it has remaining into the iPhone. If the battery is attached to the phone and I plug the the battery charge cable it will charge the phone to 100% first, then charge the battery.

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