Stays connected with your family and friends by getting extra battery power today! This replacement battery has an integrated microchip that prevents overcharging and lengthens battery life. Best replacement for the original battery with comparable standby and talk time. USA style plugs offers EU plug adapter for the customer who could use this charger conveniently when travelling in European. - Battery charger input: AC 100~240V - Battery charger output: DC 4.2V USB: DC 5.2V/800mA - 3.7V/1500mAh Li-ion battery - Compatible with Samsung S5830/Galaxy Ace - Battery charger with 2-flat-pin plug also comes with EU plug adapter