The **W2TS-3AA-R** is a specific electronic sub-assembly, typically identified as a **battery holder** or a power module designed to house **3 AA batteries** in a series configuration. It is commonly found in industrial equipment, consumer electronics, and portable devices. --- ### 1. General Specifications The primary function of this part is to provide a reliable mechanical and electrical interface for power delivery. | Feature | Description | | :--- | :--- | | **Battery Size** | AA (R6/LR6) | | **Capacity** | 3 Cells | | **Output Voltage** | ~4.5V (Alkaline) / ~3.6V (Rechargeable NiMH) | | **Mounting Type** | Wire Leads or Solder Pins (varies by sub-variant) | | **Material** | High-impact Plastic (usually ABS or Polypropylene) | | **Contact Material** | Nickel-plated Steel or Stainless Steel | --- ### 2. Key Components & Construction The W2TS-3AA-R consists of several critical electronic elements: 1. **Spring Contacts:** Negative terminals usually feature a coil spring to ensure constant pressure, compensating for slight variations in battery length and providing vibration resistance. 2. **Flat Contacts:** Positive terminals are usually fixed plates. 3. **Housing Case:** Provides structural integrity and ensures cells are aligned in the correct polarity. 4. **Wiring/Termination:** * **Red Wire:** Positive (+) terminal. * **Black Wire:** Negative (-) terminal. * *Note:* Some versions feature a specific connector (like a JST or Molex) at the end of the leads. --- ### 3. Electrical Characteristics When integrated into a circuit, the following electrical principles apply: * **Series Connection:** The cells are connected end-to-end. The voltage of each cell is added together ($V_{total} = V_1 + V_2 + V_3$). * **Current Capacity:** The Ampere-hour (Ah) rating remains equal to a single cell (e.g., if using 2500mAh batteries, the total capacity is 2500mAh at 4.5V). * **Internal Resistance:** The total resistance is the sum of the three batteries plus the contact resistance of the springs and wires. --- ### 4. Common Applications * **Handheld Instruments:** Multimeters, scanners, and portable testers. * **LED Lighting:** Portable lanterns or emergency backup lights. * **Robotics:** Logic power for microcontrollers (like Arduino or ESP32) using a voltage regulator. * **Toys:** High-drain RC vehicles or electronic learning aids.