3.7V 21700 3000mah Rechargeable Cell (11.1Wh)

The 3.7V 21700 3000mAh Lithium-ion Rechargeable Cell is a high-capacity, high-performance power source designed for demanding electronic applications. With its 3000mAh capacity and 11.1Wh energy output, this cell provides long-lasting, stable power for a wide range of devices including flashlights, power banks, RC toys, e-bikes, portable electronics, and DIY battery packs.

Built with advanced lithium-ion technology, the 21700 cell offers higher energy density, longer cycle life, and improved efficiency compared to traditional 18650 cells. Its compact cylindrical design makes it ideal for both individual use and for assembling larger battery packs for robotics, solar storage, and custom projects.

Key Features:

• High Capacity: 3000mAh ensures extended usage time.
• Stable Voltage: 3.7V nominal voltage, suitable for most modern electronics.
• Energy Output: 11.1Wh for efficient performance.
• Compact Size: Standard 21700 form factor (21mm diameter × 70mm length).
• Rechargeable & Long Life: Can be recharged hundreds of times.
• High Energy Density: More power in a smaller size compared to older cells.
• Lightweight & Portable: Easy to carry and integrate into projects.
• Eco-Friendly: Reduces waste by replacing disposable batteries.

Specifications:

• Battery Type: Lithium-ion Rechargeable Cell
• Model: 21700
• Nominal Voltage: 3.7V
• Capacity: 3000mAh
• Energy: 11.1Wh
• Charging Voltage: 4.2V (max)
• Discharge Cutoff Voltage: 2.75V (approx.)
• Standard Charge Current: ~1A (recommended)
• Max Continuous Discharge Current: Varies by application (typically 5A–10A depending on build)
• Dimensions: Ø21mm × 70mm
• Weight: ~70g (approx.)
• Cycle Life: 500+ cycles (under standard usage)

Applications:

• Power banks and portable chargers
• Flashlights and LED torches
• RC cars, drones, and hobby electronics
• E-bikes, scooters, and portable power tools
• DIY battery packs (3.7V single-cell or multi-cell series/parallel configurations)
• Robotics and IoT devices
• Solar storage and backup systems

Safety Features & Precautions:

• Do not overcharge (use a proper lithium charger, 4.2V max).
• Do not discharge below recommended cutoff voltage.
• Avoid short-circuiting terminals.
• Keep away from water, fire, and extreme temperatures.
• Use only in devices designed for lithium-ion batteries.

Note: Images are for illustration purposes only.