with built-in battery
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Use the protective inner case with or without the battery sleeve.
2,500 mAh battery more than doubles your battery capacity. Press the charging button to start your charge or check the battery level.
The ENERGI Power Case for the iPhone 5/5s is a sleek protective case with a built-in battery, which doubles your standard battery life. So thin, it's hard to believe it packs an additional 9 hours of talk time. It adds only 9mm to the thickness of an iPhone. 2 slim-line cases are included; 1 black, 1 colored (available in Lime, Red and Blue), which slides out of the charging sleeve so your phone remains protected when you don't need the extra charge. Once your phone is charged, simply remove the exterior charging sleeve to reveal a slim-line inner case for traveling light. ENERGI is superior in design, material, quality and construction.
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Favorite battery cases
Comfortable, dependable and convenient, TYLT's ENERGI Sliding Power Case is one of the best premium battery.
Included in PCMag’s Best iPhone 5S & 5C Cases.
Not only does the $99 Tylt Energi Sliding Power Case offer the best endurance we've seen from an iPhone case--nearly 10 hours more--it does so in a versatile and attractive design ... the Tylt Energi is one of the best iPhone 5/5s battery cases on the market.
It's the best of the power cases we've tried, in part because of the standout battery capacity, but mostly due to the sliding case-within-a-case mechanism. - See more at: http://tylt.com/energi-sliding-power-case-ip5/#sthash.F290GdM1.dpuf
The TYLT Energi Case is my pick for best power case and gets a huge 5 out of 5 stars from me.
Thanks to its two-piece design, the TYLT offering can easily claim to be one of the best looking power battery pack covers around
The TYLT Energi Power Case is the best power case I've used. 5/5 stars.