Cylindrical Batteries

387 products

📖 Click to view full specifications, comparison & safety guide

Cylindrical Batteries – 18650, 21700, 26650 & Full Range of Industrial-Grade Cylindrical Cells & Packs

Welcome to our Cylindrical Batteries collection. As the most widely adopted lithium-ion battery form factor globally, cylindrical cells offer standardized dimensions, high energy density, excellent cell-to-cell consistency, and robust mechanical stability. They serve as the core power source for consumer electronics, power tools, electric mobility, energy storage systems, and industrial equipment. This collection encompasses the full spectrum of popular cylindrical formats—including 18650, 21700, 26650, 14500, 16340 (RCR123A), 18350, 20700, and beyond—and provides a one-stop solution from single-cell retail and bulk wholesale to custom battery pack assembly.

What Are Cylindrical Lithium Batteries? Why Choose Cylindrical?

Cylindrical lithium-ion batteries consist of wound electrode sheets encased in a metal can (typically steel), filled with electrolyte and equipped with a safety vent. Compared to pouch cells and prismatic cells, cylindrical cells offer several key advantages:

Standardization & Interchangeability: Globally unified dimensions (e.g., 18650 = 18mm diameter × 65mm length) ensure broad device compatibility and easy replacement.
High Mechanical Strength: Steel casing provides superior impact and crush resistance, far exceeding the structural integrity of pouch cells.
Excellent Thermal Dissipation: Cylindrical geometry promotes airflow, and the wound internal structure offers short heat dissipation paths—ideal for medium to high-rate discharge applications.
Superior Consistency: Mass automated production ensures minimal variance in capacity, internal resistance, and voltage between cells, resulting in longer cycle life for assembled packs.
Integrated Safety Devices: Many models feature built-in PTC thermistors and CID (Current Interrupt Device) that disconnect the circuit or vent pressure under abusive conditions.
Low Total Cost of Ownership: Massive production capacity and mature manufacturing processes yield among the lowest cost-per-Wh in the lithium battery family.

Popular Cylindrical Battery Models – Quick Reference

Model	Diameter × Length	Typical Capacity Range	Typical Applications
18650	18mm × 65mm	1500mAh – 3500mAh	Flashlights, power banks, power tools, vaping, energy storage
21700	21mm × 70mm	3000mAh – 5000mAh	EVs, power tools, high-power flashlights, portable power stations
26650	26mm × 65mm	3000mAh – 5500mAh	High-power flashlights, power tools, medical devices, AGVs
14500	14mm × 50mm	600mAh – 1000mAh	AA battery replacement, small flashlights, digital cameras
16340 (RCR123A)	16mm × 34mm	500mAh – 800mAh	Tactical flashlights, laser rangefinders, night vision
18350	18mm × 35mm	700mAh – 1200mAh	Compact flashlights, mini vape mods
20700	20mm × 70mm	3000mAh – 4250mAh	Power tools, high-power vaping, RC models
4680 / 4695	46mm × 80/95mm	20Ah – 30Ah+	Next-gen EVs, grid energy storage

Shop by Performance Category – Find Your Ideal Cylindrical Cell

Category	Key Characteristics	Representative Models	Best For
High Capacity	3500mAh+, runtime prioritized	18650 35E, 21700 50E	Flashlights, IoT devices, power banks
High Drain	20A–45A continuous discharge	18650 VTC5A, 21700 P42A	Vaping, power tools, RC models
LiFePO₄ (IFR)	3.2V nominal, inherent safety, 2000+ cycles	IFR18650, IFR26650	Solar storage, medical devices, UPS
Protected	Built-in PCB for overcharge/discharge/short-circuit	Various Button Top models	Consumer flashlights, toys, DIY kits

Typical Applications for Cylindrical Batteries

Application	Common Models	Technical Requirements
Consumer Electronics (Flashlights, Power Banks, Speakers)	18650, 21700, 14500	High capacity, protected options available
Power Tools (Drills, Saws, Grinders)	18650, 21700	High drain (20A–40A), low IR
Electric Mobility (E-bikes, Scooters, Motorcycles)	18650, 21700, 4680	High capacity, long cycle life, BMS-equipped
Energy Storage (Home Storage, Telecom Backup)	18650, 26650, LiFePO₄	Ultra-long cycle (2000+), high safety
Vaping / Atomizers	18650, 20700, 21700	High drain (20A–35A), genuine OEM cells
RC Models / Drones	18650, 21700 (High Drain)	Extreme discharge rates, lightweight
Medical Devices (Monitors, Ventilators, Pumps)	18650, 26650	High reliability, protected, LiFePO₄ optional
Industrial Equipment / AGVs / Robotics	18650, 26650, 21700	Long cycle life, custom packs available

Custom Battery Pack Assembly Services

Beyond individual cells and bulk wholesale, we offer professional cylindrical battery pack customization:

Series (S): 2S – 20S+, increasing voltage (12V, 24V, 36V, 48V, etc.)
Parallel (P): 2P – 10P+, increasing capacity and discharge current
Series-Parallel (S+P): 2S2P, 3S4P, 10S3P, etc., for simultaneous voltage and capacity scaling
BMS Integration: Common/separate port protection, passive/active balancing, fuel gauge, communication protocols (UART/RS485/CAN)
Enclosures & Connectors: PVC heat shrink wrap, plastic cell holders, custom enclosures; XT30/XT60/XT90, DC barrel, silicone lead wires

Why Choose Our Cylindrical Batteries?

Genuine Grade-A Cells: Direct sourcing from Samsung, LG, Murata (Sony), Panasonic, Molicel, EVE, and other Tier-1 manufacturers. 100% Grade-A—no recycled, refurbished, or B-stock cells.
Fully Tested & Matched: Every batch undergoes capacity grading, IR testing, and voltage screening. Industrial-grade matching services ensure pack consistency.
Honest Capacity Ratings: We strictly adhere to industry-standard testing. No exaggerated claims like 4000mAh+ 18650s or 6000mAh+ 21700s.
Flexible Purchasing: Single-cell retail, multi-pack discounts, tiered bulk pricing, and pallet-level wholesale available.
Certified & Documented: UN38.3, MSDS, CE, RoHS documentation provided for all shipments, ensuring smooth international logistics and customs clearance.
Expert Technical Support: Full-spectrum consultation on cell selection, pack design, BMS matching, and charger recommendations.

👇👇👇 Browse products by model (18650 / 21700 / 26650...) or by performance category (High Capacity / High Drain / LiFePO₄...) using the subcategories and filters below. For bulk quotes or custom pack solutions, please contact our engineering team.

Showing 1 - 24 of 387 products