This high 3500mAh of capacity + 1500mAh Li-ion batteries help you get the most out of your cell phone. Two batteries one pack provide your phone with the enough power for less cost no need to worry that you lost connections with your family because of the phone is power off.The batteries have an integrated microchip that prevents overcharging and lengthens battery life. Comes with included battery back cove too it fits the Samsung i9000 100%. - Replaces your broken or damaged original battery and battery cover - Compatible with Samsung i9000 - Comes with a battery cover