The **W2SP-2AA-R** is a specific electronic component, primarily recognized as a **battery holder** manufactured by **Memory Protection Devices (MPD)**. It is designed to house and connect AA batteries to a circuit. --- ### 1. General Specifications The W2SP-2AA-R is a "Wire Lead" type battery holder designed for two AA cells in a series configuration. | Feature | Specification | | :--- | :--- | | **Manufacturer** | Memory Protection Devices (MPD) | | **Battery Cell Size** | AA | | **Number of Cells** | 2 | | **Configuration** | Series (Output: ~3.0V for Alkaline) | | **Termination Style** | Wire Leads (Red/Black) | | **Mounting Type** | Chassis Mount / Surface | | **Material** | Polypropylene (Body), Nickel Plated Steel (Springs) | --- ### 2. Key Electronic Components & Materials The unit consists of three primary electronic/mechanical parts: * **The Housing (Body):** Made of high-impact black polypropylene. It acts as an insulator to prevent short-circuiting between the battery shells and the chassis. * **Contacts & Springs:** These are usually made of **Nickel-Plated Spring Steel**. The "R" in the part number often denotes high-quality resin or specific contact plating to resist corrosion from battery leakage. * **Wiring (Leads):** * **Red Lead:** Positive (+) terminal. * **Black Lead:** Negative (-) terminal. * Typically uses 26 AWG wire, approximately 6 inches (152mm) in length. --- ### 3. Application Use Cases Because of its simple wire-lead interface, this part is commonly used in: 1. **Handheld Electronics:** Remote controls, toys, and portable measurement tools. 2. **Backup Power:** Providing CMOS or RTC (Real-Time Clock) backup power for PC boards. 3. **Prototyping:** Often used with Arduino or Raspberry Pi projects where a mobile 3V power source is required. --- ### 4. Technical Diagram Representation In a circuit schematic, the W2SP-2AA-R is represented as two DC cells in series: ```text [ + ]----------( Red Wire )-----> VCC (+3V) [ | ] [ Cell ] [ | ] [ | ] [ Cell ] [ | ] [ - ]----------( Black Wire )----> GND (0V) ```