21.9V 3A Desktop Battery Charger for 6S LiFePO4 Battery Packs | Guangdong QINX

This 21.9V 3A LiFePO4 battery charger from Guangdong QINX is designed to meet the needs of devices using 6-cell lithium iron phosphate battery packs that require higher charging current and improved energy replenishment efficiency. With a 65.7W output capacity, it provides a faster charging cycle compared to lower-current models, making it suitable for applications where downtime reduction is critical.

The charger supports a wide input voltage range of 100–240VAC, enabling seamless deployment across global markets. It is compatible with various regional power cords, including US, EU, UK, AU, JP, KR, and IN plug standards, making it suitable for international OEM product integration.

To support diverse product designs, multiple DC output interfaces are available, allowing manufacturers to match different device architectures and battery enclosure requirements. Custom branding, electrical tuning, and packaging design services are also provided for large-scale OEM/ODM projects.

Compared with standard low-power chargers, this 3A version delivers improved charging efficiency while maintaining safe and controlled battery management for LiFePO4 chemistry, helping extend battery lifecycle and operational stability.

Applications

• Portable energy storage systems
• Industrial control equipment
• Smart robotics and automation devices
• Medical portable instruments
• Security and surveillance systems
• Wireless communication equipment
• Outdoor power supply devices
• Agricultural monitoring systems
• Marine and RV auxiliary power systems
• Portable testing and measurement tools

Connector Options

Available output connector types include:

• 5.5×2.1mm DC plug
• 5.5×2.5mm DC plug
• 6.3×3.0mm DC connector
• 4.0×1.7mm DC connector
• 3.5×1.35mm DC connector
• 7.4×5.0mm laptop-style connector
• GX aviation connector series
• XT30 / XT60 / XT90 connectors
• Anderson Powerpole connector
• XLR 3-pin / 4-pin connectors
• JST / Molex wire harness
• SAE connector
• T-type (Deans) plug
• Customized OEM cable assembly solutions

Safety Design & Protection

Built-in intelligent protection system ensures stable operation:

• Over-voltage protection (OVP)
• Over-current protection (OCP)
• Short-circuit protection (SCP)
• Over-temperature protection (OTP)
• Surge and spike protection

Certifications

Compliant with international safety and efficiency standards:

UL / cUL / CE / FCC / RoHS / UKCA / PSE / SAA / CB / DOE Level VI

Suitable for regulated markets and global distribution channels.