You do not need a special back cover to use this battery This package is specifically designed for the cellphones we list here, if your cellphone is not in the list , then it"s not for you. ====================================================================== 100% Brand New. AceSoft 1960mAh Rechargeable Li_ion Battery: * Brand: AceSoft. * High quality Li-Ion battery. * Battery Type: Lithium Ion. * Battery Capacity: 1960 mAh. * Voltage: 3.7V. * The best spare battery for your phone. * Best Replacement for the original battery with comparable standby and talk time . * Our battery is sent out with little or no power, so please charge it for about 4 - 6 hours before using. * Keep an extra battery on hand for extend standby and talk times. * Integrated microchip prevents overcharging and lengthens battery life. Compatible models: Samsung Galaxy S Blaze 4G , SGH-T769 (T-Mobile)