21700 3.7V 4000mAh Rechargeable Lithium Li Ion Battery Cell

21700 3.7V 4000mAh Rechargeable Lithium Li Ion Battery Cell. High Capacity Options: Available in 4000mAh and 4200mAh capacities for 21700 cells. OEM/ODM Services: Customization available for sticker, logo, package, and connector. Comprehensive Certifications: CE, RoHS, MSDS, and UN38.3 certified for safety compliance. Wide Application Range: Suitable for power tools, e-motorcycles, cleaning appliances, and energy storage. Fast Lead Time: Peak and off-peak season lead time within 15 working days. Sample Availability: Samples are available for testing and evaluation. ISO9001 Quality Control: Complete quality control system based on ISO9001 standard. Flexible Payment Terms: Accepts T/T, LC, PayPal, and Western Union.