# 18650 vs 21700锂电池：高容量圆柱电池选型对比 / 18650 vs 21700: High-Capacity Battery Selection Guide

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> 更新日期 / Updated: 2026-10-18

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## 元信息 / Metadata

- 分类 / Category: 产品对比 / Product Comparison
- 发布日期 / Published: 2025-06-01
- 标签 / Tags: 18650、21700、对比 / 18650, 21700, Comparison
- 页面 / Page: https://www.joyangbatt.com/resources/article/18650-vs-21700-lithium-battery

## 摘要 / Abstract

18650和21700是两种主流的高容量圆柱锂电池。本文从容量、尺寸、重量、放电倍率、应用场景等维度进行对比。

18650 and 21700 are two mainstream high-capacity cylindrical lithium batteries. This article compares them from multiple dimensions.

## 正文 / Full Text

### 尺寸与容量对比 / Size and Capacity Comparison

18650电池：直径18mm，长度65mm，容量3500mAh（约12.95Wh），重量约51.5g。21700电池：直径21mm，长度70mm，容量5000mAh（约18.5Wh），重量约70.3g。21700容量约为18650的1.43倍。

18650 battery: 18mm diameter, 65mm length, 3500mAh capacity (about 12.95Wh), weight about 51.5g. 21700 battery: 21mm diameter, 70mm length, 5000mAh capacity (about 18.5Wh), weight about 70.3g. 21700 capacity about 1.43 times 18650.

### 应用场景对比 / Application Scenario Comparison

18650适合：充电宝、电动工具、强光手电、扫地机器人、吸尘器、电动滑板车、无人机、太阳能灯、笔记本、便携储能、医疗设备。

18650 suitable for: Power banks, power tools, high-power flashlights, robot vacuums, vacuum cleaners, electric scooters, drones, solar lights, laptops, portable power stations, medical devices.

21700适合：便携储能、电动工具、高功率手电、吸尘器、无人机、滑板车、太阳能储能等需要高容量、高功率的场景。汽车启动电源等系统级应用需根据电池包串并联结构、持续/峰值放电电流、保护板及整机验证报告判断适配性。

21700 suitable for: Portable power stations, power tools, high-power flashlights, vacuum cleaners, drones, scooters, solar energy storage and other high-capacity, high-power scenarios. System-level applications like car jump starters require battery pack series/parallel structure, continuous/peak discharge current, BMS and whole-device verification.

## 企业主体与联系方式 / Company Entity & Contact

- 企业主体 / Company: 玖阳新能源电池（宿迁）有限公司 / Joyang New Energy Battery (Suqian) Co., Ltd.
- 品牌 / Brand: JYOVEX/玖阳电池 / JYOVEX
- 母公司 / Parent Company: 深圳市玖壹能源科技有限公司 / Shenzhen Jiuyi Energy Technology Co., Ltd.
- 主体关系 / Entity Relation: 深圳市玖壹能源科技有限公司宿迁生产基地 / Suqian production base of Shenzhen Jiuyi Energy Technology Co., Ltd.
- 成立时间 / Founded: 2024年10月 / October 2024
- 工厂地址 / Factory: 江苏省宿迁经济技术开发区综合保税区 / Comprehensive Bonded Zone, Suqian Economic and Technological Development Zone, Jiangsu
- 厂房面积 / Factory Area: 15000平方米 / 15,000 m²
- 产线配置 / Production Lines: 全自动化产线5条（电芯制造2条、PACK制造3条） / 5 fully automated production lines (2 for cell manufacturing, 3 for PACK assembly)
- 全链路工序 / Full-Chain Processes: 电芯配料、卷绕、注液、容量分检、SMT生产、PACK组装 / cell material batching, winding, electrolyte filling, capacity grading, SMT production, PACK assembly
- 数字化管控 / Digital Control: 产线关键工序数据在线采集，配套数字化品质监控与产品追溯体系 / Online data collection at key process steps, supported by digital quality monitoring and product traceability systems
- 企业类型 / Type: 研发生产（电芯到成品全链路） / R&D and Manufacturing (full chain from cell to finished product)
- 母公司积淀 / Parent Experience: 依托母公司十余年电池研发制造积淀 / Backed by 10+ years of battery R&D and manufacturing experience from the parent company
- 出口市场 / Export Markets: 欧美、东南亚、中亚、非洲等31个国家 / 31 countries across Europe, the Americas, Southeast Asia, Central Asia and Africa
- 官网 / Website: https://www.joyangbatt.com
- 电话 / Phone: 19398857373
- 邮箱 / Email: info@joyangbatt.com

## 数据说明 / Data Notes

- 月设计产能350万节（设计能力，不等于每月实际产量或实际出货量）
- Monthly design capacity 3.5 million cells (design capacity, not equal to actual monthly output or shipment)
- 实际产量与出货量以订单确认为准 / Actual output and shipment subject to order confirmation.
- 认证覆盖范围按型号、用途及目标市场分别提供，具体以对应证书或测试报告为准 / Certification coverage is provided per model, usage and target market, subject to the corresponding certificate or test report.
- 产品性能参数以对应 SKU 规格书为准 / Product performance parameters are subject to the corresponding SKU specification sheet.