2x 18650 Battery Cell Holder with Cover and On/Off Switch

18650 2-Cell Battery Holder Overview

The 18650 2-Cell Battery Holder with Cover and On/Off Switch is a compact, reliable power module designed for DIY electronics and portable projects. It securely holds two 18650 lithium-ion cells and provides a convenient built-in ON/OFF rocker switch and snap-on cover for safe handling and transport.

Key Features of this Battery Holder

• Holds 2 × 18650 Li-ion batteries (cells not included)
• Built-in ON/OFF rocker switch for quick power control without extra wiring
• Snap-on protective cover to prevent accidental contact and keep batteries clean
• Durable ABS plastic enclosure for long-term use
• Pre-soldered red (+) and black (-) wire leads for fast integration
• Lightweight and portable design, suitable for handheld devices

Specifications

• Battery Type Supported: 18650 Lithium-Ion
• Number of Cells: 2 (wired in series by default for ~7.4V nominal)
• Output Voltage: Approximately 7.4V with two cells (varies with charge level)
• Material: ABS plastic enclosure
• Switch: Built-in ON/OFF rocker switch
• Leads: Pre-soldered red (+) and black (-) wires
• Dimensions: Approx. 78 × 42 × 20 mm (may vary slightly)
• Weight: Approx. 30 g (without batteries)

Applications and Compatibility

• DIY electronics and embedded projects
• Robotics and rapid prototyping
• Arduino, Raspberry Pi, ESP32/ESP8266 projects that require portable power
• Portable LED lighting, flashlights, and custom lamps
• RC toys, small gadgets, and mobile power packs

Installation and Wiring Notes

• Install two 18650 cells following polarity marks inside the holder.
• By default the holder is set up for series wiring for higher voltage (approx. 7.4V). Rewiring the contacts can produce a parallel arrangement if desired; do not reconfigure unless you understand battery wiring and safety.
• Use the pre-soldered red wire for positive output and black wire for negative output. Secure connections and insulate exposed joints.
• Verify switch operation before final assembly into your project enclosure.

Safety and Handling

• Use only protected, matching 18650 Li-ion cells from reputable manufacturers.
• Do not short-circuit the terminals. Keep the snap-on cover in place during transport.
• Do not expose the holder to water, extreme heat, or physical damage.
• Always charge batteries with a suitable charger and monitor cell balancing when using multiple cells.

Note: Images are for illustration purposes only. Batteries are not included.