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3000mAh Li-Ion Battery Pack

Rechargeable lithium-ion pack with integrated protection circuit. Delivers stable 7.4V output for Raspberry Pi robots, motor driver boards, and mobile electronics projects. Compact form factor, reliable charge cycles, and safe discharge management.

  • Voltage 7.4V
  • Capacity 3000mAh
  • Chemistry Li-Ion
  • Protection Built-in circuit
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3000mAh Li-Ion battery pack with protection circuit on electronics workbench

Why This Battery Works for Robotics

  • Stable 7.4V Output

    Two-cell configuration delivers consistent voltage for Raspberry Pi boards, motor drivers, and servo controllers without drooping under load.

  • Protection Circuit Included

    Built-in safeguard monitors voltage, current, and temperature to prevent overcharge, over-discharge, and short-circuit damage.

  • Compact and Lightweight

    Li-ion chemistry offers high energy density, keeping your robot's weight down while delivering the capacity needed for extended runtime.

  • Rechargeable Design

    Standard charging via compatible Li-ion charger. Reusable across hundreds of cycles, reducing both cost and waste over the project's lifetime.

Technical Specifications

Nominal Voltage
7.4V (2S configuration)
Capacity
3000mAh
Chemistry
Lithium-Ion (Li-Ion)
Protection
Overcharge, over-discharge, short-circuit circuit
Connector Type
Standard barrel or JST (confirm with vendor)
Charge Method
CC/CV (constant current / constant voltage)
Cycle Life
Typical Li-Ion range (300–500 cycles)
Operating Temperature
Standard lithium-ion operating range

Where to Use This Pack

Power Wheeled and Tracked Robots

The 7.4V output matches the voltage range of most dual H-bridge motor drivers and DC gearmotor setups. Use this pack to drive two to four small motors while powering your Raspberry Pi or Arduino controller from a separate regulator or buck converter.

  • Line-following robots with continuous runtime
  • Obstacle-avoidance builds running ultrasonic sensors and servos
  • Sumo bots and competition entries requiring portable power

Common Questions

Do I need a special charger for this battery?

Yes. Li-ion packs require a charger that matches the cell configuration (2S in this case) and follows the CC/CV charging profile. Our USB-C Smart Charger is compatible with standard 7.4V Li-ion packs. Always verify connector type and voltage before charging.

Can I power a Raspberry Pi 4 directly from this battery?

Not directly. The Pi 4 requires 5V via USB-C, while this pack outputs 7.4V. Use a buck converter or step-down regulator to drop the voltage to 5V at 3A. This setup is common in mobile Pi robot builds.

How long will this battery last in a typical robot?

Runtime depends on your robot's current draw. A Raspberry Pi 4 under moderate load draws roughly 600–800mA; two small DC motors at 50% duty cycle might add another 400–600mA. At 1.2A total draw, expect around 2.5 hours. Higher loads (video streaming, continuous motor movement) will reduce runtime.

Is the protection circuit enough, or do I need additional safety components?

The built-in circuit protects the battery itself from electrical faults. For complete system safety, add a fuse or polyfuse on the output and ensure your motor driver or regulator has its own overcurrent protection. This layered approach prevents downstream shorts from damaging upstream components.

Can I use multiple packs in parallel to increase capacity?

Parallel connection of Li-ion packs is possible but requires matching voltage and state of charge, plus a balancing circuit or BMS (battery management system) to prevent uneven discharge. For most hobbyist projects, it's simpler to use a single higher-capacity pack or swap batteries as needed.