KUNER Battery Case for iPhone 6/6s (2,400mAh) with Built-in 16GB Storage, White Outstanding charger case with built-in storage for the iPhone 6/6s. The extra 16GB memory allows for 30,000 more photos, 7.2 hours of more video and 6,000 more songs. Rechargeable 2400mAh lithium ion polymer battery with 16GB of built-in storage and protective case in one. Provides you twice the battery life of the iPhone 6/6s -- Up to 8.8 hours of talk time on 4G and LTE. Super compact iPhone 6 charging case is light weight, only 69 grams, hardly feel the existing of the case. The memory case takes use of TOSHIBA MLC fast data storage memory chip under eMMC standard. TI power management chips are used on the charger case to control and protect iPhone.