Maxboost 2 x Battery for Samsung Galaxy S4, Samsung Galaxy SIV, Samsung Galaxy S IV (Without NFC) + Travel Charger/Battery Charger with USB output Made with Grade A+ Li-ion cells with a capacity of 2300mAh; Built-in smart circuit charge protection; Certified by CE / RoHS; 500+ recharge cycles over the life of the battery Design and Engineered for Samsung Galaxy S4 SIV S IV any version in order to maximize the best conversion rate and usage time. The travel charger features state indicator that shows the current charging state (red for charging; blue for fully charged). Charger Power Output: 4.2V 600mA Certified Performance by Maxboost with 6month manufacturer warranty. Box Content: 2 x cell phone battery, 1 x user's manual, 1 x wall plug battery charger with USB output;