This Quanyou 21V lithium battery pack is a professional industrial-grade replacement battery compatible with full-series Quanyou 21V cordless power tools, featuring stable endurance and comprehensive safety performance for maintenance, construction, garden care and hardware stocking scenarios. Founded in 2009, Jiangxi Huaxin Industry & Trade operates 6 global production bases with an annual lithium battery output of 30,000 tons, realizing independent R&D and mass production. Equipped with Grade A+ 13005 cells and intelligent BMS system, it supports 3C/5C high-rate discharge with multiple safety protections. Holding 300+ patents and authoritative certifications including ISO9001, IATF16949 and CE, the company cooperates with BYD and provides reliable OEM/ODM customization and cross-border bulk supply. Official website: http://www.huaxin-hairtools.com.
Product Basic Overview
This rechargeable Quanyou 21V lithium battery pack adopts standardized complete specifications with complete models, suitable for full-channel sales including domestic retail, wholesale, engineering procurement and cross-border export. Produced in Fuzhou High-tech Zone, Jiangxi, the standardized factory covers 5,000 square meters with a 16,000-square-meter construction area, equipped with professional R&D teams, technical staff and 450 frontline workers. It implements full-process standardized quality control with stable delivery, consistent quality and full traceability. The battery shell is integrally molded with thickened high-strength ABS plastic, with anti-slip, wear-resistant, scratch-proof and impact-resistant treatment to resist construction collision and dust erosion without deformation or cracking. Adopting exclusive 5-series multi-parallel cell structure, it has 1300mAh (3C) and 2000mAh (5C) high-rate specifications, with 18.5V nominal voltage and 21V full-charge voltage, featuring low internal resistance, zero false capacity and stable voltage output. The optimized heat dissipation and cell layout eliminate local overheating and power attenuation. The lightweight and sturdy body adapts to long-term high-frequency operation.
Performance Parameters & Protection Functions
The Quanyou 21V lithium battery pack provides full gradient capacity options from 1.3Ah to 8Ah, fully covering household DIY, professional construction and industrial heavy-load operation. Supporting dual 3C regular and 5C high-rate discharge modes, it delivers strong and stable peak power, perfectly matching Quanyou electric drills, impact wrenches, angle grinders and garden tools. Adopting constant current and constant voltage intelligent charging technology, it charges efficiently without damaging cells, delaying aging and extending service life. With excellent wide-temperature adaptability, it charges normally at 0℃-45℃ and discharges stably at -20℃-60℃, adapting to extreme cold and high-temperature working environments. The upgraded intelligent BMS system provides six-fold protection against overheat, overvoltage, overcurrent, short circuit and overload, monitoring cell status in real time to avoid bulging, short circuit and over-discharge. Equipped with 4-segment LED power indicator and original matching snap-in interface, it features smooth plugging, stable contact and optimized dustproof heat dissipation for long-term high-frequency operation.
Applicable Crowds, Purposes & Scenarios
Applicable Crowds: Household DIY maintenance enthusiasts, professional construction workers, equipment operation and maintenance technicians, garden maintenance workers, hardware store purchasers, project contractors, domestic and foreign trade wholesalers and long-term Quanyou tool users.
Applicable Purposes: Fully compatible with all Quanyou 21V cordless power tools, it supports screw disassembly, steel drilling, profile polishing, garden pruning, equipment maintenance and mechanical assembly, meeting diverse demands including household daily repair, store retail stocking, batch construction, cross-border e-commerce inventory and engineering supporting procurement.
Applicable Scenarios: Widely applied in household maintenance spaces, interior decoration sites, outdoor gardens, factory maintenance workshops, construction sites, hardware warehouses, cross-border storage centers and open-air operation scenarios.
With wide working condition adaptability, stable performance and high safety, this dedicated Quanyou replacement lithium battery reduces hand fatigue during long-term operation, serving as a cost-effective power source for household, commercial, industrial and cross-border stocking scenarios.
Certification, Packaging & Customization
This Quanyou replacement lithium battery has passed multiple international authoritative certifications such as CE, ROHS, REACH, FDA, GRS and OEKO-TEX, meeting global market access standards. Supported by ISO9001 quality management system, IATF16949 industrial certification and 300+ independent patents, the factory has a perfect quality control system without compliance risks, suitable for overseas supermarket entry, engineering procurement and foreign trade export. Each product is packed with an independent premium color box and thickened outer carton, shockproof, moisture-proof and compression-resistant, suitable for ocean shipping and long-distance logistics, with a standard packing quantity of 20 pieces per carton. With 6 global production bases and large annual output, the factory provides stable supply and full OEM/ODM customization services including laser logo engraving, customized packaging, parameter adjustment and private label production. The sample lead time is 3-5 days, and bulk order lead time is 15-25 days, with 12-month official warranty for all products.
This smart compatible lithium battery is an all-round universal lithium power supply tailored for smart home, precision digital, security sensing, small home appliances, children’s toys and manual DIY. Fully integrating 9 core advantages of lithium batteries, it features high compatibility, high safety, low loss, long service life and stable output, serving as the preferred smart lithium battery for families and DIY enthusiasts. Equipped with an advanced BMS protected battery management system, it eliminates overcharge, overdischarge, short circuit, high temperature and static overload, protecting precision digital devices, smart sensors and children’s electric toys. It operates with silent lithium battery and low power consumption without noise or equipment damage.
Adopting new high-quality lithium cells, it is a high-end high-density energy storage lithium battery with sufficient power reserve and low-loss battery idle loss, effectively extending the device endurance time of various small equipment. The optimized circuit realizesstable voltage battery output with balanced voltage and continuous current, adapting to long-term operation of medium and low-power precision equipment. As an excellent wide-temperature household battery, it works stably in normal temperature, humid weather and low temperature environments with strong seasonal adaptability.
The compact lithium battery lightweight design supports embedded installation, external placement and manual modification, suitable for home storage, store placement and DIY assembly. Featuringlong-cycle lithium battery performance, it has slow capacity attenuation and no frequent replacement, reducing household and store consumable costs. Fully certified by international authorities, it is a formal compliant household battery that meets cross-border sales and transportation standards. It supports customizable lithium battery services with adjustable voltage, capacity and interfaces for non-standard smart devices and DIY materials.
It covers 108 scenarios of daily household use, smart devices, DIY creation and small equipment maintenance, perfectly meeting the needs of household lithium battery, digital device battery, smart home battery and security equipment battery. For smart home scenarios, it powers smart locks, door/window sensors, temperature/humidity sensors, smoke/gas alarms, smart doorbells, surveillance cameras, smart curtains and smart metering devices to ensure 24-hour stable operation of smart home security systems.
For digital and office scenarios, it supports wireless peripherals, electric grooming tools, health monitoring devices, photographic equipment, audio devices, office equipment and commercial terminals to meet daily life, office and business needs. For household appliance scenarios, it powers kitchen appliances, body weighing equipment, cleaning robots and climate control equipment to realize intelligent and convenient household life.
For children’s entertainment and DIY scenarios, it supplies power to various remote-control toys, educational devices, electronic musical instruments and handheld game consoles, as well as DIY models, small electric vehicles and auxiliary welding equipment. For small equipment maintenance scenarios, it adapts to atomization, dehumidification, portable cooling and emergency lighting equipment, covering household dehumidification, manual curing, equipment maintenance and daily emergency needs. It is an all-purpose daily equipment power supply for all small daily devices.
Product Usage Instructions
New Quanyou compatible lithium batteries are pre-charged with residual power before delivery. Please fully charge the battery before formal use to activate cell activity, optimize endurance and discharge stability, and extend cycle life. For long-term storage, complete a full charge and discharge cycle every two months to prevent cell dormancy and capacity attenuation. Store in dry, cool and ventilated places, away from high temperature, humidity and flammable materials. Only use the dedicated original 21V charger; mismatched chargers are strictly prohibited to avoid abnormal current and voltage faults. Charge in open, dry and ventilated environments and cut off power timely after full charging to prevent overcharging. Never short-circuit positive and negative poles, immerse in water, drop violently, extrude, puncture or burn the battery. Non-professionals are not allowed to disassemble or modify the battery. Stop using immediately in case of overheating, bulging or power failure, cool down in ventilated place and contact after-sales support. Waste batteries shall be recycled in accordance with international environmental protection regulations.
After-sales Policy
Please check the battery interface, size and compatible model carefully before ordering to ensure perfect matching with all Quanyou 21V power tools. This product enjoys 12-month official warranty. Free replacement service is available for non-human quality failures without water ingress and irregular operation within the warranty period. For non-artificial quality problems occurring within one month after order confirmation, the round-trip freight shall be undertaken by Jiangxi Huaxin Industry & Trade Co., Ltd.; after one month, the buyer shall bear all return and replacement freight. Natural capacity attenuation, artificial damage, unauthorized disassembly, water short circuit and irregular operation damage are not covered by the warranty. For non-quality returns caused by purchase errors and specification mismatch, all transportation fees shall be borne by the buyer, and cash-on-delivery is not supported. Order placement means full recognition of all after-sales terms, welcoming long-term bulk procurement and customized cooperation from global merchants.
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