3.7V 2500mAh High Capacity Li-ion Battery Pack for Samsung Galaxy S3 SIII i9300 2500mAh high capacity Lithium Ion battery pack This replacement battery is rechargeable without memory effect Best replacement for the original battery with comparable standby and talk time Robust, durable battery, compatible with Samsung Galaxy s3 i9300 Integrated microchip prevents overcharging and lengthens battery life