18650 7.4 battery box with DC plug

Dual-Cell Series 7.4V Power Output: Holds two 18650 lithium-ion cells wired in series to deliver a nominal 7.4V output (8.4V fully charged), ideal for powering microcontrollers, robotics platforms, and audio amplifiers.

Standard 5.5mm x 2.1mm DC Barrel Jack: Pre-wired with a male DC barrel plug for direct plug-and-play connectivity into Arduino development boards, motor drivers, breakout shields, and portable power hubs.

Enclosed Dual-Slot Molding: Holds two 18650 cylindrical batteries snugly in place, offering secure retention against structural movement and physical shock in mobile applications.

High-Tension Spring Contacts: Heavy-duty nickel-plated spring terminals ensure strong mechanical grip, low electrical resistance, and continuous current delivery.

Impact-Resistant ABS Shell: Constructed with durable black ABS plastic that protects batteries against external impacts while keeping weight down.

Molded Polarity Markers: Clear positive (+) and negative (-) symbols embossed on the internal tray floor prevent incorrect battery orientation and reverse-voltage accidents.

Body Material: High-impact ABS composite plastic.

Connector Type: 5.5mm x 2.1mm male DC barrel plug.

Technical Specifications:

Cell Support: 2x 18650 Li-ion Cells (Series configuration, 7.4V nominal).

Lead Wire: Color-coded insulated copper wire (Red = +, Black = -).

Color: Matte Black.

Usage Advice: Ensure both 18650 batteries are at equal voltage/charge states before inserting them in series into the enclosure.

Maintenance: Wipe contact points clean with isopropyl alcohol to maintain optimum conductivity.

Essential Plug-and-Play Power Module: Position as the go-to external battery supply for Arduino development projects, smart robot chassis, LED drivers, and DIY portable electronics.

Highlight DC Plug Convenience & 7.4V Output: Emphasize the pre-terminated DC barrel jack which eliminates the need for manual soldering when patching power into microcontrollers and breadboards.

Recommended Cross-Sell Add-ons: Pair with 2 x 18650 Battery holder Case, 2 x 16850 cell box with cover/ON-OFF, 1 x 18650 Battery Holder SMD, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Battery Holder & Cases collection page under the pre-wired interface battery boxes section.