3 cell L-ion battery holder:

Here are some general specifications you might find for a typical 3-cell battery holder:

1. Voltage Output:
   • The total voltage output depends on the type of cells used. For standard AA or AAA cells (1.5 volts each), a 3-cell holder would provide a total output voltage of 4.5 volts.
2. Battery Type:
   • The holder is designed for a specific type of battery, such as AA, AAA, or other cylindrical cells. Ensure that you use cells of the same type and capacity.
3. Construction:
   • Material: The holder is usually made of plastic to provide insulation and protect the batteries.
   • Contacts: Metal contacts or springs inside the holder establish electrical connections with the battery terminals. These contacts should securely hold the batteries in place.
4. Connection Terminals:
   • The holder typically has two connection terminals - one for the positive (+) and one for the negative (-). These terminals are used to connect the battery holder to an external circuit or device.
5. Polarity Markings:
   • Clear markings for the positive and negative terminals to ensure proper alignment with the batteries. Polarity markings are essential to prevent reverse polarity, which can damage devices.
6. Wiring and Leads:
   • Some holders may have built-in leads or wires, making it easier to connect the holder to a circuit. Others may have connection points where you can attach your own wires.
7. On/Off Switch (optional):
   • Some battery holders may include an on/off switch, allowing you to easily control the power flow to the connected device.
8. Dimensions:
   • The physical dimensions of the holder, including length, width, and height, to ensure compatibility with the intended application.
9. Mounting Holes (optional):
   • Some holders may include holes or features for easy mounting in a project or device.
10. Build Quality:
    • The overall build quality of the holder, including the durability of the plastic housing and the reliability of the electrical connections.