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The 3 x 18650 Battery Holder (Without Cover) is a lightweight open-slot power chassis designed to securely house three $18650$ lithium-ion rechargeable battery cells. Manufactured from rigid, impact-resistant ABS plastic, this 3-slot battery holder is optimized for rapid swapping of cells during testing and prototyping.

The internal contacts connect the three $18650$ battery slots in series wiring, delivering a nominal output voltage of $11.1\text{V DC}$ ($12.6\text{V}$ peak when fully charged). High-tension nickel-plated spring steel contacts keep the batteries firmly seated, maintaining low contact resistance even during high-vibration applications like mobile robots and RC cars. With color-coded 26AWG pre-soldered wire leads, it easily connects to terminal blocks, breadboards, or custom power distribution PCBs.

Key Features and Benefits

• Series Wired 3S Output ($11.1\text{V}-12.6\text{V}$): Combines three $3.7\text{V}$ cells in series to provide $11.1\text{V}$ nominal power, suitable for driving 12V DC motors, solenoids, or voltage regulators.

• Open-Frame Easy Access: Design without cover enables fast battery insertion, temperature monitoring, and voltage checking without removing screws or lids.

• High-Tension Spring Contacts: Nickel-plated steel springs ensure low electrical resistance and prevent battery dislodgement under movement.

• Compact & Screw-Mountable: Includes mounting screw holes integrated into the base for firm attachment inside robot chassis or project enclosures.

• Color-Coded Lead Wires: Pre-soldered $15\text{cm}$ red ($+$) and black ($-$) wires simplify circuit integration.

Technical Specifications

Polarity & Safety Warning Guide

• Red Wire ($V+$): Positive output ($+11.1\text{V}/+12.6\text{V}$).

• Black Wire ($GND$): Negative output ground ($0\text{V}$).

CRITICAL LI-ION SAFETY WARNING:

1. Pay strict attention to positive ($+$) and negative ($-$) polarity orientation indicators molded inside each battery slot. Reversing cells creates a direct short circuit that can cause severe overheating or cell damage.

2. Always use three $18650$ cells of the same brand, age, capacity (mAh), and charge state to prevent cell imbalance.

3. This holder does NOT contain an internal Battery Management System (BMS) or balancing circuit. Always connect an external 3S BMS protection board when charging or running high-load circuits to prevent over-discharge and short circuits.

Applications

• Robotics Chassis: Power supply for 12V DC motors, L298N/TB6612FNG motor drivers, and servo controllers on 2WD/4WD Arduino/Raspberry Pi robots.

• 12V LED Lighting: Portable power source for 12V LED strips, COB chips, and emergency lighting arrays.

• DIY Power Packs: Prototyping custom 3S battery packs with external BMS protection modules.

• Wireless Audio & IoT: Driving high-power Bluetooth amplifier boards (e.g., TPA3116) and remote Wi-Fi sensor setups.

Package Includes

• 1 x 3 x 18650 Battery Holder Case Box (Without Cover)

Shipping & Delivery

• Free shipping on orders above ₹999 across India

• Dispatched within 1-3 business days

• Expected delivery: 3-7 business days depending on location

• Secure packaging to ensure safe transit of electronic components