Product Overview

The 21700-5000mAh lithium-ion rechargeable cell is a high-capacity cylindrical battery designed for applications requiring reliable power delivery across a wide temperature range. With a nominal voltage of 3.6V and robust low-temperature performance, this cell is suitable for use in demanding environments.

Electrical Specifications

Performance Characteristics

Discharge Efficiency at Various Rates (25°C)

Low-Temperature Discharge Performance

Cycle Life and Storage

• Cycle Life: ≥70% capacity retention after 800 cycles (0.5C charge / 1C discharge, 4.20V–2.75V)
• Storage (25°C, 28 days): Residual capacity ≥85%, recovery capacity ≥90%
• Storage (55°C, 7 days): Residual capacity ≥85%, recovery capacity ≥90%

Safety Features

• Overcharge protection
• Over-discharge protection
• Short-circuit protection
• Thermal stability testing
• Compliant with international safety standards

Applications

• Portable medical devices
• Low-temperature industrial equipment
• Outdoor and backup power systems
• High-drain consumer electronics

Notes

• Avoid charging below 0°C or above 45°C
• Do not discharge below 2.5V to prevent cell damage
• Store in a dry environment (0–50% RH) at 10–35% state of charge (SOC) for long-term storage

Our Mission:  Original Innovation, Power the Future!

As a high-tech enterprise specializing in the R&D and manufacturing of lithium-ion batteries, sodium-ion batteries, and solid-state batteries. Founded in 2020 in Shenzhen, China’s innovation hub, we are driven by our core philosophy of "Original Innovation & Development" , delivering sustainable, high-performance energy solutions for global applications, including consumer electronics, smart devices, electric vehicles, and energy storage systems.

With dozens of proprietary patents, the accreditation of Guangdong Provincial Eco-Friendly Lithium Battery Engineering Research Center, and strategic collaborations with leading institutions like National University of Singapore, Wuhan University, and Shenzhen University, OiD continuously pushes the boundaries of battery technology. Our products power critical infrastructure, including high-speed rail energy storage, residential solar systems, and defense projects, accelerating the global transition to clean energy.

Key Strengths

1.  Original Innovation
   • Core technologies in Li/Na-ion and solid-state batteries, backed by inventions, utility models, and design patents.
   • Joint R&D centers with top universities (e.g., Wuhan University), enabling rapid commercialization of cutting-edge research.
2.  End-to-End Energy Solutions
   • 500+ customizable battery models for consumer electronics, EVs, and grid-scale storage.
   • Superior performance: high energy density, fast charging, extended cycle life, and extreme-temperature resilience
3. Sustainability Commitment
   • Eco-conscious materials (e.g., cobalt-free cathodes, solid electrolytes) and processes to minimize environmental impact.
4. Global Reach
   • R&D Hubs: Shenzhen, Wuhan (university partnerships)
   • Manufacturing: Automated production lines in Shenzhen
   • Markets: Asia, Europe, North America