OEM/ODM 3.7V Series Battery

We provide high-quality Bullcue 3.7V rechargeable lithium batteries designed to meet diverse application needs. Our product range includes 14250, 10440, 18350, 18500, 18650, and 26650 models, offering flexible solutions for various devices and performance requirements. With support for customization in capacity, size, and discharge performance, our batteries ensure reliable power, long cycle life, and stable output—making them ideal for electronics, energy storage, and industrial applications.