You do not need a special back cover to use this battery<br> 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.<br> ====================================================================== <br> 100% Brand New.<br> 4400mAh Rechargeable Li_ion Battery:<br> * Brand: Unbranded .<br> * High quality Li-Ion battery.<br> * Battery Type: Lithium Ion.<br> * Battery Capacity: 4400mAh.<br> * Voltage: 3.8V.<br> * The best spare battery for your phone.<br> * Best Replacement for the original battery with comparable standby and talk time .<br> * Our battery is sent out with little or no power, so please charge it for about 6 - 12 hours before using.<br> * Keep an extra battery on hand for extend standby and talk times.<br> * Integrated microchip prevents overcharging and lengthens battery life.<br>