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21V Lithium Battery Pack Compatible with Dayi Power Tools
Compatibility: For Dayi
Voltage: 21V
Capacity: 4.0Ah 6.0Ah
Type: Li-ion Battery (18650 cell)
Place of Origin: China
Product Introduction
- Brand: USPECIAL
- Voltage: 21V
- Capacity: 4.0Ah, 6.0Ah (*optional)
- Discharge Rate: 5C,10C (*optional)
- Output Power: 400W/800W (*optional)
- Battery Type: Lithium-ion
- Operating Temperature: 0~45°C (charge); 0~55°C (discharge)
- Material: PC/ABS
- OEM/ODM/OBM: Available
Our portable lithium battery pack are designed and built to be used in conjunction with the appropriate power tools and interchangeable with the Dayi lithium ion pack.
The lithium ion pack company consists of ten 18650 lithium-ion cells, which provide powerful power support for the tool, ensuring unparalleled performance for your application. Of course, it offers a range of capacity options, including 2.0AH,6.0AH and more, providing flexible performance to meet your needs.
Dayi Power Tools Co., Ltd. is a China-based, world-oriented professional engaged in lithium battery power tools research and development, design, production of industry solutions provider. We are fortunate to be able to make its replacement portable lithium battery pack according to its original power tools, and professionally replace its power tools for use.
Our Advantages
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In-House Manufacturing
We operate our own production lines, giving us full control over every stage — from battery cell production to final pack assembly.
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Strong R&D Capabilities
We invest heavily in innovation — particularly in BMS technology — striving for higher precision, smarter algorithms, and enhanced safety features.
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High Production Efficiency
We maintain a daily output of over 5,000 battery packs, offering both small-batch flexibility and large-scale efficiency.
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Tailored Customization
We provide fully customized solutions — adjusting voltage, capacity, interfaces, and overall design based on your specific application.
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Rigorous Quality Control
All products go through multiple inspections and reliability tests, ensuring they meet international standards and perform dependably in the field.
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Reliable After-Sales Support
We ensure our battery packs operate safely and reliably, giving you peace of mind well beyond delivery.
FAQS
It can be considered according to the purpose of the cell, including the load of the product used. You can also contact the salesman for replacement battery pack factory.
Of course, our products use Grade A cells internally, and the entire replacement battery pack meets industry standards and is certified.
Stock samples can be shipped within three days, custom samples need 7-10 days. Bulk shipment will take about 25-35 days.
Of course, please contact replacement battery pack factory and put forward your sample requirements, we will make samples for you according to your requirements and send.
Our general MOQ is 100, if there are other special customization requirements according to the actual situation to agree.
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Contact us to get free quotation & battery solution.