KEEPS BOTH PRIMARY CONTROLLER BATTERY & A SPARE BATTERY CHARGED FOR FULL-TIME ACTION; WITH INCLUDED AC ADAPTER, A SPARE BATTERY IS TURBO CHARGED IN 1 HR; CUSTOM-DESIGNED TO WORK AS A CRADLE FOR CONTROLLERS—WILL HOLD CONTROLLER SECURELY WHILE PLUGGED INTO CONSOLE TO CHARGE BATTERY; FEATURES A COOL GREEN GLOWING BASE TO MATCH CONSOLE & A DUAL LED SYSTEM THAT NOTIFIES USER WHEN THE SPARE BATTERY IS CHARGING & WHEN FULLY CHARGED