The term **03-R** (often written as **R03**) generally refers to a specific international standard for battery sizes, specifically the **AAA battery** (Triple-A). Below is a breakdown of the electronic specifications, chemistry, and physical characteristics of this part. --- ### 1. General Specifications The "R03" designation follows the **IEC (International Electrotechnical Commission)** naming convention. | Attribute | Specification | | :--- | :--- | | **IEC Name** | R03 (Carbon-Zinc) / LR03 (Alkaline) | | **Common Name** | AAA | | **Nominal Voltage** | 1.5V (Primary) / 1.2V (Rechargeable NiMH) | | **Shape** | Cylindrical | | **Typical Capacity** | 800 – 1200 mAh (Alkaline) | --- ### 2. Chemistry Variations While "03" refers to the size, the letter prefix (if any) indicates the internal chemistry: * **R03 (Carbon-Zinc):** The standard "heavy-duty" battery. It has lower capacity and is prone to leaking but is very inexpensive. Best for low-drain devices like TV remotes. * **LR03 (Alkaline):** The most common consumer version. It uses Manganese Dioxide and Potassium Hydroxide. It has a high energy density and long shelf life. * **FR03 (Lithium):** Li-FeS2 chemistry. These are lightweight, perform well in extreme cold, and have the highest capacity. * **HR03 (NiMH):** Nickel-Metal Hydride. These are **rechargeable** units with a nominal voltage of 1.2V. --- ### 3. Physical Dimensions The physical envelope of an 03-R part must strictly adhere to these dimensions to ensure fitment in battery compartments: | Dimension | Measurement | | :--- | :--- | | **Diameter** | 10.5 mm (0.41 in) | | **Height** | 44.5 mm (1.75 in) | | **Weight** | ~11.5 grams (Alkaline) | --- ### 4. Typical Applications Because of its small form factor, the 03-R is used in portable electronic devices that require low to medium power consumption: 1. **Remote Controls:** TV, AC, and audio equipment. 2. **Small Flashlights:** LED "pen" lights. 3. **Wireless Peripherals:** Computer mice and keyboards. 4. **Medical Devices:** Digital thermometers and pulse oximeters. 5. **Toys:** Small motorized cars or handheld electronic games. ---