The Xbox's wireless controllers make playing your favorite games fun and easy, but wireless devices need a lot of power. Having an extra Xbox battery pack on hand will give you the freedom to play for hours on end. If the battery in your Xbox controller won't hold a charge any longer, look online for some cheap Xbox battery packs before you order another rather expensive one from the manufacturer. They make take a little longer to get to you, but you can save money with free shipping offers. The best Xbox battery packs will even last longer than the ones that came with your controllers.