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Apple releases $99 iPhone 6s Smart Battery Case, Apple's first official battery pack iPhone case - 9to5Mac
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iPhone 6S review: a very good phone ruined by rubbish battery life | Apple | The Guardian
Vyměnil jsem si baterii ve dva roky stárem iPhonu 6s. Zvýšil se tím jeho výkon? – Letem světem Applem
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