Koomos(TM) 2 x 2600mAh Li-ion Batteries + Battery Travl Charger + Koomos(TM) Cleaning Cloth for Samsung Galaxy S4 GT-I9500, SCH-I545(Verizon), SGH-I337(AT&T), SPH-L720(Sprint) Made with Grade A Li-ion cells; Built-in circuit protection; Certified by CE / RoHS; More than 500 recharge cycles over the life of the battery; Type: Li-ion battery; Voltage: 3.8V; Capacity: 2600mAh Compatible with various devices: Samsung Galaxy S4, Indicator of the charger shows the current charging state (red for charging; blue for fully charged) Package includes: 2 x cell phone battery, 1 x battery charger,