Maxboost Atomic Samsung Galaxy S4 Battery Case - 4200mAh, Glossy White/Silver (A.K.A. Samsung Galaxy S IV Battery Case, Samsung I9500 Battery Case, Samsung S4 Battery Case, Samsung Galaxy SIV Battery Case Charger Cover ) The powerful 4200mAh built-in battery can effectively extend the battery life of your Galaxy S4. It can easily add 14 hours of talk time and 16 hours of web browsing time. Featuring a fully protective hard shell case with the minimum added bulk. Enjoy the comprehensive Ergonomic protection while still maintain the reasonable form factor of your iPhone. The case featuring Micro USB charging port pass through, and can be charged together with the galaxy s4 phone via included the MicroUSB cable. The Maxboost Atomic Plus Battery Case deploys the most reliable battery technology, which can live up to its standard and being rechargeable for more than 500 cycles. The Atomic battery case also has the following functions built-in: charging switch, LED battery level indicator, charge & sync through the case, headphone jack cutout, function button cutouts.