cylindrical cells
Product Definition & Technical Characteristics
Cylindrical lithium batteries are metal-cased cells with standardized dimensions and strong mechanical integrity, widely used in power tools, e-bikes, energy storage modules, and industrial devices. Common models include 18650, 21700, and 26650. These batteries are known for their excellent consistency, high energy density, and effective heat dissipation.
LARGE offers a wide range of cylindrical cell solutions, supporting various chemistries such as LiCoO₂, NMC, and LiFePO₄. Customized modules with different voltages, capacities, and discharge rates can be configured in series or parallel to meet specific project requirements.
Selection Guide & Customization Advice
When selecting cylindrical lithium cells, key factors include cell size (e.g., 18650, 21700), rated capacity, voltage platform, discharge rate, and operating temperature range. For high-current applications, cells rated at 2C or higher are recommended, while compact devices benefit from energy-dense 21700 cells.
LARGE supports comprehensive customization, covering cell chemistry, voltage/capacity configuration, series-parallel combinations, BMS integration, thermal design, casing, and terminal layout. OEM/ODM services are available to meet the unique requirements of industrial and consumer product developers.
Mature Technology with Cost Efficiency
Cylindrical cells benefit from mature, standardized manufacturing processes, enabling cost-effective mass production ideal for both industrial and commercial deployment.
Excellent Thermal and Discharge Performance
The metal casing allows superior heat dissipation and supports high-rate discharge, making it ideal for power tools, starter batteries, and other high-demand applications.
High Consistency for Modular Assembly
Standardized sizes and manufacturing stability ensure high consistency across cells, simplifying modular integration and system management.
Multiple Size & Chemistry Options, Customizable
LARGE offers a wide range of sizes (18650, 21700, 26650) and chemistries (LiCoO₂, NMC, LiFePO₄), all fully customizable to meet specific project needs.
Typical Applications
Applied in e-bikes, scooters, motorcycles, and AGVs, supporting both propulsion and auxiliary power.
Employed in home solar storage, UPS systems, and telecom base station energy modules.
Ideal for flashlights, e-cigarettes, portable fans, wireless cameras, wearables, and compact medical instruments.
Cylindrical Cells – Frequently Asked Questions
Common models include 18650, 21700, and 26650. The numbers indicate the cell’s diameter and length in millimeters (e.g., 18650 = 18mm × 65mm).
Cylindrical cells offer high consistency, strong thermal performance, and cost-efficiency for automated production, though they have lower space utilization than pouch or prismatic types.
Yes. LARGE provides full customization—from single cells to complete battery packs—including capacity, voltage, BMS features, connectors, and packaging.
They can be connected in series or parallel, but must be used with a properly designed BMS to ensure protection from overcharge, overdischarge, and short circuits.
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