Link Dream 3.7V 2 x 3300mAh Li-ion Battery + US Plug Battery Charger for Samsung Galaxy S4, S IV , I9500, I9505, Galaxy J, M919 (T-Mobile), I545 (Verizon), I337 (AT&T), L720 (Sprint) High Quality and brand new High Capacity Replacement Battery It is recommended to fully drain and fully charge the battery especially during the first 3 charging and discharging cycles, doing so may greatly improve the overall life of the battery