Sporting Standard 1650mAh 3.7V Li-ion is fantastic as a short road trip battery. It's bigger than I want to carry when flying but is perfect for charging. Right now Sporting Persistence has their Sporting Standard 1650mAh 3.7V Li-ion Battery For Cricket ZTE Prelude ZTE Z993 Cellphone Fast USA for cheap price. You'll just need to visit the site.
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)New 1650mAh Rechargeable Li_ion Battery: * Brand: Sporting Persistence. * High quality Li-Ion battery. * Battery Type: Lithium Ion. * Battery Capacity: 1650mAh. * Voltage: 3.7V. * The best spare battery for your phone. * Keep an extra battery on hand for extend standby and talk times. * Integrated microchip prevents overcharging and lengthens battery life. * This Battery could also be charged in the phone directly thru the cell phone charger.