PhoneSuit"s custom High density lithium-ion 2100 mAh Battery cell coupled with an advanced chipset & electronics delivers high conversion efficiency when providing power to your iPhone. The iPhone 5S charging case can provide up to 125% additional iPhone power. The PhoneSuit Elite iPhone 5 Battery Case represents the perfect balance of power, protection and style for your iPhone 5S & iPhone 5. Having the iPhone 5 charging case allows you to extend the time you use your iPhone by removing the power restrictions that effect your daily lifestyle. The PhoneSuit Elite more than doubles the power of the iPhone 5 by providing enough energy to get through 2 days of usage without a recharge. That"s up to an extra 125% of iPhone power on demand. The iPhone 5 charger case features a soft touch, metallic-rubber grip coating, advanced power chipset, custom high density PhoneSuit battery cell encased in an ultra-thin full protection design. The PhoneSuit"s high strength materials and reinforced construction ensure exceptional reliability and durability. The iPhone charger case has been beautifully designed to complement the iPhone perfectly. It retains the iPhone"s true form while also enhancing ergonomics and comfortability. PhoneSuit Elite is the only full protection iPhone 5s battery case to provide full access to the audio jack. No need for an extra headphone adapter, removing the case or some other cumbersome solution. It works great with most straight and curved headphone jacks without issue. Featuring reinforced construction and high strength metallic rubber composite materials, the Elite has been drop tested from every angle to assure this iPhone 5s charger case performs flawlessly. Smart Power Management prioritizes and manages power delivery to your iPhone battery case. Features include pass-through charging, prioritized charging and automatic-off when the iPhone reaches 100%.