EWT 3.7V 21000mAh 18650 Li-ion Rechargeable Battery Pack for Portable Bluetooth Speaker
High Capacity: 21000mAh provides extended runtime for portable devices.
Long-Life Performance: 800 cycles ensure reliable use over time.
Wide Temperature Range: Operates efficiently between -20°C to 60°C.
Durable Construction: Li-ion 18650 cells for robust performance.
Multiple Certifications: RoHS, CE, and FCC compliant for peace of mind.
Free of harmful heavy metals, conforms to international environmental standards for global export.
Compact package with large capacity, easy for installation in outdoor portable power and energy storage equipment.
Support customized wire length, connector, housing shape to match solar storage, portable power equipment demands.
Every battery pack undergoes capacity testing and aging inspection before shipment for stable bulk quality.
Shenzhen Everwin Tech Co., Limited is a 20-year battery manufacturer specializing in lithium iron phosphate, lithium ion, and Ni-MH batteries. With ISO 9001:2015 certification, they offer OEM/ODM solutions for electric vehicles, tools, and storage systems. Their products comply with CE, UL, and other global standards, ensuring safety and quality in diverse applications.
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