Features: Enhances your power solution with our 18650 Battery Holder, design for seamlessly compatibility with V 3 development boards and offering robusts protections features to extend battery life and ensure device safety. This holder features a 4slot design, allowing multiple batteries to be connecting in parallel, meeting higher power demands while maintaining stable connection through high conductivity materials. Suitable for electronics enthusiasts, hardware developers, and educational institutions, this product caters to those who require reliable power management in their project. Perfect for use in robotics, portable devices, and prototypes development, it provides flexible power supports across various applications, enhancing mobility and innovation. With its compactly design and easy to solder interfaces, this PCB holder is suitable for all levels of developers, making it excellent addition to any DIY electronic project or educational setups. Specifications: Component:PCB Size:Approx.100x91mm/3.93x3.58inch Color:Black Output:USB Current:0.5A Input voltages:5~8V Output: 3V1A/5V2A Package Includes: 1pc 18650 Battery Holder(18650 Battery not included) note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.