The PROMASTER XtraPower Battery Storage Case and Tester provides an ALL-IN-ONE solution for storing your AA/AAA batteries and evaluating their condition. This handy gadget has a 5-LED fuel gauge which accurately shows the remaining power in your battery plus its Smart circuitry makes it compatible with both rechargeable and standard AA or AAA batteries.

• Holds 4 AA or AAA batteries
  
• 5-LED Fuel Gauge
• Works with both rechargeable and standard batteries