3-Slot 18650 Battery Holder Case with Bare Wire Leads (11.1V Series)

When your project requires 12V-class power but you want to avoid the permanence and specialized equipment required for spot-welding a custom pack, the 3-Slot 18650 Battery Holder Case is the perfect solution. Designed to securely house three standard 18650 lithium-ion cells, this holder is internally pre-wired in a series configuration. The moment you snap in three fully charged cells, the holder instantly combines their voltage to deliver a nominal 11.1V output (peaking at 12.6V), making it the ideal power source for standard 12V DC components.

Built for prototyping and field deployment, the chassis is molded from rigid, high-impact ABS plastic. It utilizes heavy-duty, nickel-plated steel coil springs that maintain constant tension against the battery terminals. This ensures a solid, low-resistance electrical connection that won't momentarily disconnect if your hardware is subjected to bumps or vibration. Terminated with standard red and black pre-stripped wire leads, this holder is ready to be soldered straight into a 3S BMS protection board, wired into a custom PCB, or plugged into a testing breadboard.

Key Features & Functional Advantages:

• Instant 11.1V Series Power: Internally bridges three 3.7V cells in series, delivering a steady 11.1V output that perfectly replaces bulky 12V lead-acid batteries in portable applications.

• Heavy-Duty Spring Contacts: The nickel-plated springs provide a firm, secure grip on both flat-top and button-top 18650 cells, minimizing voltage drop across the contacts.

• Rugged ABS Enclosure: The tough plastic housing protects the cells from physical impacts and features a flat bottom for easy mounting inside 3D-printed project boxes or weather-proof enclosures.

• Flexible Pre-Tinned Leads: Comes equipped with approximately 15cm of color-coded wire (Red for Positive, Black for Negative), saving you the hassle of soldering directly to battery terminals.

• Hot-Swappable Convenience: Allows you to instantly pop out depleted cells and replace them with freshly charged ones, or easily remove cells to balance-charge them in a dedicated smart charger.

Perfect For:

• Energy Metering & Telemetry Nodes: The ideal, easily serviceable physical housing for the main power reserve in off-grid data loggers and remote environmental sensors.

• DIY 12V UPS & Power Banks: Pairs perfectly with a 3S 10A BMS to build custom uninterruptible power supplies for routers, development boards, and homelab networking gear.

• Custom Robotics: Provides the necessary 11.1V power to drive high-torque 12V DC gear motors and servos in autonomous rovers and mechanized chassis.

• Portable LED Lighting: An excellent, lightweight power source for driving 12V LED light strips, portable floodlights, and custom camera lighting rigs.

Technical Specifications:

• Battery Compatibility: Holds 3 x 18650 Lithium-Ion Cells (Supports Flat-Top and Button-Top)

• Wiring Configuration: Series (Internal)

• Nominal Output Voltage: 11.1V (3.7V x 3)

• Fully Charged Voltage: 12.6V (4.2V x 3)

• Connection Type: Bare Wire Leads

• Wire Length: Approximately 15cm (6 inches)

• Housing Material: High-Impact Black ABS Plastic

• Contact Material: Nickel-Plated Steel

• Approximate Dimensions: 78 mm x 60 mm x 21 mm (L x W x H)

Ensure your order is placed by 2PM to guarantee next-day delivery! Our commitment to prompt service includes a 24-hour delivery system through our network of carriers, aimed at ensuring your package arrives right on schedule.

Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.