21700 Battery Packs Manufacturer
Nuranu Battery specializes in custom 21700 battery packs that deliver higher energy density, increased discharge rates, and extended cycle life compared to standard 18650 packs. Perfect for electric vehicles, robotics, energy storage, and industrial equipment, our packs are engineered with precision cell matching, protective housings, and optional BMS integration for maximum reliability and safety.
21700 Battery Pack Definition
A 21700 battery pack is a set of multiple 21700 lithium-ion battery cells that are connected together in a series, parallel, or series-parallel arrangement. The name “21700” refers to the specific physical dimensions of the cylindrical cell: 21mm in diameter and 70mm in length. The last “0” shows that it is round.
Our 21700 Battery Pack Products
Unlock Higher Performance with 21700 Technology
The 21700 cell format (21mm diameter, 70mm length) is rapidly becoming the new standard for high-performance applications, famously adopted by Tesla. Compared to traditional 18650 cells, 21700 battery packs offer:
- Higher Energy Density: Up to 5000mAh per cell, reducing the total number of cells needed for the same capacity.
- Lower Pack Resistance: Fewer cells mean fewer connections and lower internal resistance, resulting in less heat generation.
- Cost Efficiency: Simplified assembly structure reduces manufacturing costs for large capacity packs.
Our Custom 21700 Battery Pack Process
- Requirement Analysis: Understand your voltage, capacity, and discharge requirements.
- Design & Engineering: Cell selection, configuration, and mechanical layout.
- Prototyping: Build and test initial units.
- Testing & QA: Thermal, cycle, and safety testing.
- Mass Production: High-quality assembly with consistent performance.
Designed for High-Drain Devices
E-Mobility
E-Bikes, E-Scooters, Skateboards, and Hoverboards (36V / 48V / 52V).
Cordless Power Tools
Drills, Saws, and Garden Tools requiring high torque (High-rate discharge cells).
Home Appliances
Cordless Vacuum Cleaners (Dyson replacement style), Robot Vacuums.
Portable Power
High-capacity power banks and outdoor power stations.
Why Choose Our 21700 Battery Packs
When it comes to powering your devices and systems, our 21700 lithium-ion batteries stand out for their exceptional quality, reliability, and performance. Here’s why our 21700 batteries are the ideal choice for your needs:
High Energy Density
Our 21700 lithium-ion batteries provide an impressive energy-to-weight ratio, allowing you to power your devices efficiently without adding unnecessary bulk. This makes them perfect for applications where size and weight matter, such as portable electronics and power tools.
Long Lifespan
Built with durability in mind, our batteries are designed to deliver a long cycle life, ensuring consistent performance over hundreds of charge and discharge cycles. This longevity minimizes replacement costs and enhances value for money.
Reliable Performance
Whether you need a stable power source for high-drain devices or consistent energy for critical applications, our 21700 batteries deliver unmatched reliability. They are engineered to operate efficiently in a variety of conditions, maintaining performance in diverse environments.
Wide Range of Applications
From electric bikes and power tools to flashlights and backup power systems, our 21700 batteries are versatile and compatible with a vast array of devices. Their adaptability ensures they meet the needs of multiple industries and use cases.
Customizable Solutions
We understand that every project has unique requirements. That’s why we offer customizable 21700 battery configurations to meet your specific voltage, capacity, and form factor needs.
FAQs
Q1: Can you match cells for optimal performance?
A: Yes, we match cells by capacity, voltage, and internal resistance for long-lasting packs.
Q2: What voltages and capacities can you provide?
A: Series/parallel configurations allow 3.7V–48V+ and customized capacity to meet your application.
Q3: Can BMS be included?
A: Yes, optional BMS integration ensures full protection and monitoring.
Q4: How long is prototype delivery?
A: Typically 2–3 weeks after design confirmation.
Q5: Are these packs safe for industrial and EV use?
A: Yes, certified to UL, CE, and RoHS standards, with rigorous QA testing.
Start Your 21700 Battery Pack Project Today!
Work with our engineers to design the perfect pack.
