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Solution
18650 Li-Ion Battery Capacity
IFR21700 Cell Engineering Reference
日本語
How to Source 21700 LiFePO4 Cells for Bulk Production Orders

How to Source 21700 LiFePO4 Cells for Bulk Production Orders

Sep 28, 2026

09-282026

Bulk sourcing for 21700 LiFePO4 cells begins when an OEM/ODM equipment program has already selected the cell format, chemistry, nominal voltage, and nominal capacity, and the procurement team needs a supplier quotation that reflects production quantities, packaging, and trade terms.
Official Notice | Unauthorized Use of Topwell Power Website Content

Official Notice | Unauthorized Use of Topwell Power Website Content

May 05, 2026

05-052026

Shenzhen I...n Technology Co., Ltd has copied Topwell Power product images, titles, specifications, and descriptions without authorization.
Please note that Topwell Power is not affiliated with this company. Kindly verify our official contact information before order.
Official Website Notice | Yichun Topwell Power Co., Ltd

Official Website Notice | Yichun Topwell Power Co., Ltd

Jan 09, 2026

01-092026

Yichun Topwell Power Co., Ltd officially declares that www.topwellpower.com is the only official website and all official emails use @topwellpower.com. Please beware of any copied or fake websites.
TOPWELL Chinese New Year Holiday Notice 2025

TOPWELL Chinese New Year Holiday Notice 2025

Jan 22, 2025

01-222025

Celebrate the Year of the Snake with Yichun Topwell Power Co., Ltd.! Our office will be closed for Chinese New Year from January 23rd to February 6th, resuming on February 7th. Wishing you joy, prosperity, and success in 2025!
How to Buy Wholesale from China for Battery Supplies in 2025

How to Buy Wholesale from China for Battery Supplies in 2025

Dec 31, 2024

12-312024

Looking to buy wholesale battery supplies from China in 2025? Discover expert tips and a step-by-step guide on sourcing lithium batteries, finding reliable suppliers, and navigating the wholesale process. Save time and money with Topwell Power's trusted insights.
The Benefits of Using a 13350 Lithium Polymer Battery

The Benefits of Using a 13350 Lithium Polymer Battery

Oct 16, 2024

10-162024

In the rapidly advancing world of technology, energy storage solutions play a significant role in the performance and efficiency of our devices. One such solution gaining popularity is the 13350 Lithium Polymer (LiPo) battery.
Mid-Autumn Festival Holiday Notice

Mid-Autumn Festival Holiday Notice

Sep 13, 2024

09-132024

Topwell Power, a leader in lithium battery solutions, announces office closure from September 15th to 17th for the Mid-Autumn Festival. Discover our products and when we will resume operations.
Explosive-Proof Battery Technology and Applications: 3.6V 19000mAh ER34615 Li-SOCl2 Battery

Explosive-Proof Battery Technology and Applications: 3.6V 19000mAh ER34615 Li-SOCl2 Battery

Aug 22, 2024

08-222024

Explore the 3.6V 19000mAh ER34615 Li-SOCl2 battery by Yichun Topwell Power Co., Ltd., designed for explosive environments. Learn about its advanced safety features, high energy density, and applications in oil & gas, mining, and defense industries.
Video-Why 10kwh LiFePO4 Batteries are Revolutionizing Energy Storage

Video-Why 10kwh LiFePO4 Batteries are Revolutionizing Energy Storage

Jun 06, 2024

06-062024

Celebrate Chinese New Year 2024 with Yichun Topwell Power Co., Ltd!

Celebrate Chinese New Year 2024 with Yichun Topwell Power Co., Ltd!

Feb 10, 2024

02-102024

Celebrate Chinese New Year 2024 with Yichun Topwell Power Co., Ltd! Embrace the Year of the Dragon with innovation, resilience, and prosperity! #ChineseNewYear #YearOfTheDragon #TopwellPower
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Battery Pack Design for Outdoor Sensor Nodes in Cold and Heat Battery Pack Design for Outdoor Sensor Nodes in Cold and Heat
Oct .19.2026
A fixed outdoor sensor node lives through hot afternoons and cold nights, so its battery pack has to be judged on usable capacity, heat exposure, and protection logic together.
Custom Wide Temperature Battery Pack RFQ for OEM Devices Custom Wide Temperature Battery Pack RFQ for OEM Devices
Oct .19.2026
A wide-temperature 18650 cell is only one input, but a shippable pack also needs a BMS, wiring, an enclosure, thermal design, and compliance documents that match the device.
Stepped Charging Currents for 18650 Cells in Cold Conditions Stepped Charging Currents for 18650 Cells in Cold Conditions
Oct .19.2026
Cold charging behaves like a state machine, where the measured temperature picks a current limit and a termination voltage before the CC/CV loop ever starts.
Designing a 3.2V 3000mAh 21700 LiFePO4 Cell for Long-Term System Economics — A Conversation with Qiaoling Mu Designing a 3.2V 3000mAh 21700 LiFePO4 Cell for Long-Term System Economics — A Conversation with Qiaoling Mu
Sep .29.2026
Topwell Power's IFR21700 cell balances 3.2V, 3000mAh capacity, 9A continuous discharge, and more than 2,000 cycles for durable battery-pack integration.
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