6xAA Battery Holder Case with DC 5.5x2.1mm Barrel Plug, 15cm Lead Wire, Black Battery Pack for Arduino DIY Electronics, Portable Power Supply for 6 AA Cells Series Output

This 6xAA battery holder case is a practical portable power solution for Arduino and general DIY electronics. It houses six AA cells and brings the pack output to a DC 5.5x2.1mm barrel plug through an attached lead, making it easy to power compatible devices without building a custom battery harness. The holder is designed for quick battery changes and stable contact using spring terminals, while the black plastic body helps protect cells during handling and installation in project enclosures.

The holder connects 6 AA cells in series. In a series configuration, the pack voltage is the sum of each cell’s voltage, while the capacity (mAh) remains the same as a single cell (capacity varies by battery type and brand). Because AA cells can be alkaline (nominal ~1.5V per cell) or NiMH rechargeable (nominal ~1.2V per cell), the real-world pack voltage will vary with chemistry, state of charge, and load current. Under load, battery internal resistance causes voltage sag; higher current draws will reduce the delivered voltage more noticeably. For projects that require a stable voltage rail (for example 5V logic), pair this pack with an appropriate DC-DC converter or regulator sized for your load.

The included DC barrel plug is 5.5x2.1mm, a common size used by many development boards, routers, LED controllers, and small electronics. Polarity is not guaranteed unless explicitly specified by the seller/device; always verify polarity with a multimeter before connecting to sensitive electronics. If your device expects center-positive (common), confirm the holder’s wiring matches that requirement or rewire as needed.

• Battery type supported: AA (6 cells required; batteries not included)
• Battery configuration: 6 cells in series
• Output connector: DC barrel plug, 5.5x2.1mm
• Lead length: 15cm (as provided)
• Color: Black
• Output voltage: depends on AA chemistry and load; often referred to as “9V class” when using 6x1.5V cells, but actual voltage varies with battery type and discharge level
• Output current capability: depends on batteries used, contact condition, and load; check your device current requirement and battery datasheet
• Housing material: plastic case with metal spring contacts (exact alloy varies by revision)

• Powering Arduino and compatible microcontroller projects in portable builds
• Battery power for sensors, small motors (with proper driver), and LED projects (with suitable regulation)
• Prototyping and field testing where mains power is unavailable
• Educational electronics kits and STEM projects requiring a simple battery pack

• Verify connector polarity and device requirements before first use; reverse polarity can damage electronics.
• If your project needs regulated 5V/3.3V, use a buck/boost converter appropriate for the expected battery voltage range and load current.
• Add an inline switch for convenient on/off control, and consider a fuse or protection circuit for safety in higher-current builds.
• For devices with a DC jack, ensure the jack is compatible with 5.5x2.1mm and confirm center-positive/center-negative requirements.
• Battery performance varies significantly with temperature, chemistry, and load profile; design with voltage sag in mind.

1x 6xAA battery holder with 5.5x2.1mm DC plug, 15cm lead