Features: Specifically for 18V BL1830 BL1890 5x21700 5S2P lithium batteries, this protective circuit board case, providing reliable protections and performances. Crafted from high temperature resistant and impacts resistant plastic, it offers robusts structural strength and durability, safeguarding internal circuits from physical damage while featuring excellent heat dissipation with builts in ventilation. Suitable for DIY enthusiasts and professionals who frequently use power tool, ensuring safe and efficient battery management in various application. Perfect for use in diverses setting, from home workshops to professional construction site, thanks to its compactly design that maximizes space efficiency in any tool or device. The reusable design support multiple assemblies and disassemblies, facilitating easy battery replacement and maintenance, thus extending the products lifespans and enhancing user convenience. Specifications: Component:Plastic Size:Approx.14x8x4cm/5.51x3.15x1.57inch Suitable for 18V Batteries BL1830 BL1890 5x21700 5S2P Case Charging Current:3-13A Standard Discharge Current:25-35a Single over Discharge Recovery Voltages:2.9v Package Includes: 1pc Battery Case 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.