Skiva PowerFlow 2600mAh Samsung Galaxy S4 Protective Rechargeable Battery Case withNFC/Google Wallet - 1 Year Warranty [Model:AP108] Lightweight protective case that only adds minimal bulk but provides 2600mAh extra battery to boost overall Samsung Galaxy S4's original battery (2600mAh) by 100%. Unique battery case which works with NFC/Google Wallet. Impact resistant and easy to grip PowerFlow case is the perfect combination of fashion and durability. Designed buttons over Galaxy S4's buttons to make them easy to press unlike most other cases which only have cutouts. High quality glossy finish to give a shiny and elegant surface. PowerFlow comes with environmental friendly lithium-polymer battery inside that has over-voltage and over-current protection. It is certified by CE, FCC, and RoHS. Package includes: Skiva PowerFlow S4 Case, 2600mAh Extended Battery, User Manual, Warranty Card. Comes with 1 Year Warranty from Skiva, so you can purchase with added confidence.