FrontTech Battery+Charger For Samsung Galaxy S4 i9500 M919 L720 I337 I537 (3batteries+1charger) High-quality and rechargeable lithium-ion cell, long conversation and standby time long working life and excellent security. Integrated microchip prevents overcharging & lengthens battery life. Rechargeable with no memory effect Stylish designmade by third party Capacity : 2600mAh