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The energy density of 21700 batteries reaches 300Wh/kg, 20% higher than that of 18650 batteries.
The main capacity range is between 3000mAh and 4800mAh, a 35% increase compared to 18650 batteries.
With the same capacity as 18650 battery packs, fewer 21700 cells are needed.
Due to the reduced number of 21700 cells, the overall weight of the battery pack is reduced.
Hongyitai 21700 Rechargeable Battery Products
Every 21700 battery pack we manufacture undergoes rigorous safety testing and meets international safety standards. It boasts an energy density of up to 300 Wh/kg, a low monthly self-discharge rate of -1%–3%, and a cycle life exceeding 500 cycles (80% DOD). It addresses the anxieties of end-products with limited size but high battery life requirements, providing the optimal battery solution for your flashlights, long-lasting outdoor inspection equipment, and portable base station power supplies.
Below are some of our most commonly produced 21700 battery pack products, featuring comprehensive overcharge, over-discharge, and short-circuit protection. We support OEM/ODM customization of wire lengths and connectors. Learn 21700 battery specs in details.
21700 5000mAh Battery
Nominal voltage: 7.4V
Nominal capacity: 5Ah
Rated energy: 37Wh
Charge current: ≤2.5A
Peak discharge current: 10A
Resistance: ≤200mΩ
21700 6000mAh Battery
Nominal voltage: 11.1V
Nominal capacity: 6Ah
Rated energy: 66.6Wh
Charge current: ≤3A
Peak discharge current: 12A
Resistance: ≤320mΩ
21700 1S1P Battery
Nominal voltage: 3.7V
Nominal capacity: 5Ah
Rated energy: 18.5Wh
Charge current: ≤2.5A
Peak discharge current: 10A
Resistance: ≤200mΩ
Custom 21700 Battery Pack Wrap for Your Brands
We offer reliable and stable 21700 battery packs, providing core power, and also offer comprehensive private labeling customization services to help your products stand out in the market. In addition to our standard green PVC, we also inkjet print detailed battery parameters and warning labels: CE, RoHS, UL.
We also provide customized plastic shells and metal frames to meet different industrial design needs. We support startups in a smooth transition from prototype testing to mass production, allowing you to work with us without pressure.
Hongyitai 21700 High Drain Battery Applications
In addition to standard rate batteries, we offer high-drain 5C and 10C rate batteries with 21,700 cells. We also provide custom BMS capable of handling high currents to prevent overheating protection from falsely triggering and forcing your device to stop working. These are widely used in power tools, e-bikes & scooters, and high-end gaming devices.
21700 Battery for Vaping
Batteries are the core component of all vaping, and we provide high-rate, high-performance power sources for high-end e-cigarette brands. Our 21700 batteries support 30A-35A discharge current and are available in various configurations with and without protection. This solves the problem of slow heating coil temperature, providing an instant large vapor production. The 21700 3.7V 5000mAh capacity allows even heavy vapers to enjoy a full day of battery life.
21700 Battery for Flashlight
In the high-end lighting field, the battery is crucial in determining a flashlight’s lumen output and range. Our 21700 battery for flashlight is designed for brand and industrial applications demanding maximum brightness. We offer ultra-high capacities of 5000mAh and above, extending your flashlight’s runtime. Our High Capacity 21700 solution eliminates the hassle of frequent battery changes needed for outdoor search and rescue or long-term inspections.
Electric Wheelchair
Electric wheelchairs are essential for user mobility, and their core power source must be absolutely reliable. We provide customized solutions for high-density, high-performance 7S 21700 battery packs for Electric Wheelchair brands, ensuring your users’ safety and peace of mind on every trip. Our most commonly produced 7S2P and 7S3P battery packs are equipped with a smart BMS with balancing capabilities, monitoring the voltage of each cell string to prevent overcharging, over-discharging, and overheating. We can provide you with an extremely stable discharge curve, ensuring the wheelchair remains fully powered even when climbing hills or under heavy loads.
21700 Battery Flat Top VS Protected
These two are easily confused, so today I’ll guide you through a quick comparison from a manufacturer’s perspective.
**21700 Flat Top Battery:** The battery is flat, and the battery pack is manufactured using an electric soldering method. It’s compact, has lower internal resistance, and excellent conductivity.
**21700 Protected Battery:** Based on the flat top battery, it adds a BMS/PCB protection circuit. Its length is increased by 2-3mm, and it offers multiple protection functions.
Why Choose Hongyitai as 21700 Battery Supplier
Stable quality and professionalism are our core values, and Hongyitai is your reliable strategic partner.
Advanced Production Lines: We have 6 automated cell sorting lines and high-precision spot welding equipment, ensuring efficient production for large-volume orders.
Expert Engineering Team: Our engineering team has over 10 years of industry experience in BMS development and battery pack architecture design, covering 12V, 24V, and 48V voltage systems; APB and sheet metal casing design.
Fully Certified Factory: We are ISO9001 quality management system certified, and all products comply with global standards such as UN38.3, MSDS, CE, and RoHS.
FAQs for 21700 battery pack
We offer a diverse selection of battery cells from Samsung, LG, Sony, EVE, Lishen, and other brands.
We typically ship 21700 battery pack samples within 3-5 working days.
We have flexible production capabilities and can support small batch orders of 500 sets.
We typically ship regular orders within 10 days and arrange air or sea freight.
We offer a 12-month quality warranty on all Hongyitai 21700 battery products.
Yes, we support OEM ODM customization services for all 21700 lithium ion battery packs.
We employ a fully automated sorting & grading system to rigorously match the voltage, internal resistance, and capacity of each cell within each battery pack.
