Be prepared and don't let a low battery ruin your kill-streak, keep your 'weapons' fully loaded by equipping your controllers with the Dual Charging Dock. The Dual Charging Dock includes a Stealth XBOX 360 Charging Dock, two Stealth Rechargeable Battery Packs and a 2 metre USB Power Cable. The Dual Charging Dock stores and charges two XBOX 360 Wireless Controllers and can be simply powered via USB from your system.