[Product Feature]

* High-capacity battery combo doubles your phone:s original capacity with minimum bulkiness. Simultaneous use of both batteries prolongs the battery lifespan.
* High energy conversion rate of up to 98%, nearly 30% higher than other extended batteries.
* Durable smart cover features an auto sleep/wake mode for your device, triggered by opening and closing the lid.
* Directly answer/reject phone calls through the case window. Custom-made cutouts allow full access to all functions, including the camera, speaker, volume control and more.
* Package contents: Anker?High Capacity Li-ion Battery (2600mAh), Anker?High Capacity Li-polymer Battery Case (3000mAh), Instruction manual

[Description]
Product DescriptionUpgrade via replacement.
We wouldn:t give you anything less than the best. Grade A cells chosen from among the top 10%. Rigorous inspection tests to ensure reliability. A built-in IC chip to prevent against short-circuiting. What does this all mean? In terms of quality, you won:t find a better replacement. Don:t just take our word for it, though - type in any quick, power-related search on Amazon and see who pops up. As the leader in our industry for the last 3 years running, we know batteries.

Smart case for your smartphone.
Backed up by the advanced pin-charging technology that prevents energy waste, the battery combo provides almost its full capacity to your smartphone. Moreover, you can answer or reject incoming calls directly from the case window, saving the hassle of opening and closing the lid. By folding and unfolding the lid, the phone automatically enters sleep or wake mode. It does far more than a simple case.

Get to know us.
We created Anker with a single goal in mind: to make the smart life easier. That means starting with affordable, high-quality gear and ending with a commitment to 100% user satisfaction and an 18-month warranty. After all, we:re customers too.

Compatible Models:
Samsung Galaxy S4, S IV, GT-I9500, GT-I9505, Galaxy J, SGH-M919 (T-Mobile), SCH-I545 (Verizon), SGH-I337 (AT&T), SPH-L720 (Sprint), SCH-R970 (U.S. Cellular/MetroPCS)
Not for Galaxy S4 Active

Note:
To prolong the battery:s lifespan and efficiency, using the battery and battery case together is strongly recommended.
Until the initial leather stiffness wears off, you may have to use a medium amount of force to fully fold the front cover back.

[Detail]
Product Details
* Product Dimensions:5.4 x 2.8 x 0.4 inches ; 4.6 ounces
* Shipping Weight: 5.1 ounces (View shipping rates and policies)
* ASIN: B00DZAXV6M
* Item model number: AK-70SMGLXS4-B4B56A
* Batteries 1 Lithium ion batteries required. (included)