7.4V 21700 Lithium Battery 20000mAh High Capacity For Robotics DIY Power Projects

 Key Features

• Ultra-High Capacity: 20000mAh nominal capacity at 7.4V (8.4V fully charged), providing industry-leading runtime for your devices.
• Premium 21700 Cells: Utilizes high-quality 21700 lithium-ion cells, known for their high energy density and long cycle life.
• Integrated BMS Protection: Built-in safety circuit safeguards against overcharge, over-discharge, overcurrent, and short circuits for worry-free operation.
• Compact & Robust Design: Dimensions of 42 × 42 × 142mm make it easy to integrate, while the durable blue PVC heat shrink casing offers excellent insulation and impact protection.
• Plug-and-Play Connector: Pre-fitted with a standard 2-pin red connector for easy installation (custom connectors available on request).
• No Memory Effect: Recharge at any level without reducing overall capacity, ensuring consistent power delivery over hundreds of cycles.

Specifications

Common Applications

• High-power portable speakers and audio equipment
• LED lighting systems, outdoor floodlights, and solar lights
• Robotics, automation projects, and RC vehicles
• Portable medical devices and monitoring equipment
• Small pumps, fans, and power tools
• Off-grid backup power supplies and DIY projects

 Safety & Usage Tips

1. Use only a dedicated 8.4V lithium-ion battery charger with matching polarity to avoid damage.
2. Do not expose the battery pack to water, high humidity, or extreme temperatures outside the specified ranges.
3. Keep away from metal objects that could short-circuit the terminals.
4. If the pack swells, leaks, or emits an unusual smell, discontinue use immediately.
5. For long-term storage, keep the pack in a cool, dry place with a 40-60% charge level.