2xAA Battery Holder Case with ON/OFF Switch, 2-Cell Series 3V Output (Typical), Black Enclosed Box, Pre-Wired Lead Cable for Arduino, Sensors, DIY Projects, Prototyping Power Pack

This 2xAA battery holder case with ON/OFF switch is a compact, enclosed power solution for DIY electronics, prototyping, and portable projects. It holds two AA batteries and routes the output through an integrated slide switch, allowing you to cut or apply power instantly without disconnecting wiring. The holder includes pre-wired red and black leads for straightforward integration into common hobby electronics setups such as breadboards, screw terminals, and direct solder connections.

The holder is wired for a 2-cell series configuration. In a series battery pack, voltages add while capacity (mAh) remains approximately the same as a single cell (capacity varies by battery type and brand). With two 1.5V alkaline AA cells, the output is typically around 3.0V when fresh, but real-world voltage will vary based on load current, cell internal resistance, temperature, and discharge level. With rechargeable NiMH AA cells (typically 1.2V nominal each), the pack output is typically around 2.4V nominal. The integrated ON/OFF switch is placed in-line with the output to interrupt the circuit, helping reduce accidental drain during storage and making it easier to safely test circuits.

The pre-attached leads provide a simple two-wire DC output: red is typically positive (+) and black is typically negative (–). Polarity should always be verified with a multimeter before connecting to sensitive electronics, especially if your application uses keyed connectors or custom wiring. This style of holder is commonly used to power low-voltage modules directly or via a regulator/boost converter when a stable voltage rail is required. For example, if your circuit requires a fixed 3.3V or 5V, you may need a suitable DC-DC converter or regulator depending on battery chemistry and load profile.

• Battery type supported: AA (2 cells)
• Battery configuration: 2S (series)
• Output voltage (typical): ~3V with 2x alkaline AA (varies with battery condition and load)
• Output voltage with NiMH (typical): ~2.4V nominal (varies by cell and load)
• Switch type: Integrated slide ON/OFF (electrical rating varies by production batch; use within low-voltage, low-current DIY applications)
• Output wiring: 2-wire lead cable (red/black), length varies by module revision
• Enclosure: Black plastic case with battery compartment and cover
• Mounting: Case includes a small hole suitable for light-duty mounting (hardware not included; fitment varies)

• Portable power for Arduino-compatible boards (when used with appropriate regulation as needed)
• Sensor nodes, small microcontroller projects, and breadboard prototypes
• LED projects, small buzzers, and low-power electronics demonstrations
• Battery-powered enclosures for classroom labs, STEM kits, and field testing
• Backup/temporary power source for small devices requiring a simple 2-wire DC input

• Confirm polarity with a multimeter before first use; do not assume polarity if your wiring harness is custom.
• Choose battery chemistry based on your voltage needs: alkaline for higher initial voltage, NiMH for rechargeable use with lower nominal voltage.
• If your circuit needs a stable rail (e.g., 3.3V regulated), consider adding a regulator or DC-DC converter; battery voltage will sag under load.
• Avoid short circuits; even AA cells can deliver high currents into a short, causing heat and potential damage.
• For higher-current loads (motors, high-power LEDs), verify switch/contact suitability and consider a holder rated for higher current.

1x 2xAA battery holder case with ON/OFF switch and leads