Discover the high-performance 4000mAh 12.8V 3.2V 4S1P Lifepo4 Battery 26650 IEC62133, designed for a wide range of applications including power tools, electric vehicles, and solar energy storage systems. This lithium iron phosphate battery offers a long cycle life of 2000 times and comes with CE, ROHS, and UN28.3 certifications.