"Notice:These batteries does not come with NFC (Near Field Communication) Feature" 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. ====================================================================== 1)USB/AC Desktop Battery Charger : * Quick charge with automatic constant current control prevents battery from over charging, short circuit, and electronic shock. * Charge your cell phone battery without the phone. * Also work with OEM (original) battery. * LED charging light indicator. Turn red in charging, turn blue when done. * Input: AC 100-240V 50/60Hz 150mAh. * Output: DC 4.2V 350mAh ¡À 50mA. * USB Port Output: 5.2V 800mAh. * Use this charger to charge the stock battery as well, swap one out when the other dies. 2)6190mAh Excellent Replacement Li_ion Battery: * Brand: Sporting Persistence . * High quality Li-Ion battery. * Battery Type: Lithium Ion. * Battery Capacity: 6190mAh . * Voltage: 3.85V. * 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 6 - 12 hours before using. * Keep an extra battery on hand for extend standby and talk times. * Each battery comes with a special chip to protect your smart phone from over-heating, short-circuit, over charging or over discharging. * Integrated microchip prevents overcharging and lengthens battery life. * Best Replacement for the original battery with comparable standby and talk time . 3)Micro USB 3.0 Cable(3ft) * Standard USB 3.0 Type A Male to USB 3.0 Micro B Male Cable. * USB 3.0 compatible with data transfer rate of 4.8 Gbps, most faster than USB 2.0. * Cable length: 100cm(approx).