Features: Advanced protections board ensures safe charging/discharging for 12V batteries, preventing overcharge and short circuits to extend battery lifespans while maintaining stable power output. Optimized 3cell structure with intelligent current distribution enhances energy efficiency by 23%, featuring heat resistant PCB that withstand impacts up to 15J for durability performances. Designed for professional using 12V battery powered tools, including construction workers and outdoor maintenance crews requiring frequent battery swaps during extended operates. Delivers consistent power in high intensity environment like construction sites and emergencies repairs, where temperature fluctuations and physical shocks challenge ordinary battery components. Easy installation integrates seamlessly for 12V lithium batteries systems, eliminating compatibility issues while providing multilayered circuit protections for users and technicians alike. Specifications: Component: PCB circuit board Size:Approx.36x32mm/1.42x1.26inch Color: Blue for 12V Battery Features: It has overcharge, overdischarge and short circuit protections functions to ensures safe and stable operate of the battery Use scenario: Battery management systems widely used in consumer electronic equipment, suitable for users who need high efficiency and reliability Package Includes: 1pc Battery Protections Board note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.