Features: This BL1830 battery protections board delivers quadruple safety with overcharge, over discharge, short circuit, and overcurrent protections to prevent battery damage effectively. Featuring sturdy components, it boasts excellent resistance to high temperatures and vibrations, ensuring stable operations across a broad temperature ranges for enhanced durability. Perfect for craft enthusiasts and professional in gardening, renovation, and other industries that require frequent battery replacements and power tool usage. Ideal for home craft projects, professional power tools, and various battery pack applications, addressing safety hazards in demanding environments like frequent battery swaps. With a largest continuous current of 30 A, this compact protections board handles heavy loads seamlessly, safeguarding against battery damage and device failures without complex wiring. Specifications: Materials: Plastic Size:Approx.45x33x10mm/1.77x1.3x0.39inches Package Includes: 1Pc Battery protections Board note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.