Will the Mophie case charger loose it's battery life if kept charged overnight?

I have an iPhone 5 and a Mophie air. I was wondering if I kept it plug in overnight would the battery eventually die? The Mophie case charges my iPhone to 100% first then the Mophie case to 100%. However since I've haven't using my phone that much, only my iPhone5 battery goes down. The Mophie remains at 100% the whole day, however I charge both at night.

Charges are smarter now. But if your mophie case is at 100 and it doesn't get used during the day, then I would'nt still charge it at night.

It depends on how the Mophie is built. The iPhone is smart and will not continue to charge a battery that's full. I presume that the Mophie does the same, in which case leaving it connected does no harm.

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