AA battery holder (2 cell)

A double AA battery holder is a plastic holder designed to securely hold two AA-size batteries and connect them to an electronic circuit. When the two batteries are connected in series, they provide approximately 3V with standard 1.5V AA batteries or 2.4V with rechargeable 1.2V NiMH batteries. The holder usually has positive (+) and negative (−) wires or terminals for easy connection. It is commonly used in Arduino projects, small robots, LED circuits, toys, sensors, and other low-voltage electronic projects.