Included are both items:

• Game Gear Battery Pack - Model No: 2142

• Sega Game Gear PowerBack - Model No: 2115

These both do not work. When plugged in, nothing happens with the Battery Pack. However — when the PowerBack is plugged in, the light does turn on, but it does not actually hold a charge. Also, the plug on the PowerBack does appear to have some corrosion on the tip. See pictures for more details. Message me with any questions because these are being sold AS IS and I won’t be accepting returns. Thanks for looking.