Features: This 2S 7.4V 8A lithium batteries protections board ensures safe charging with advanced smart management, preventing overcharge, over discharge, and short circuits for 18650 batteries while optimizing energy transfer efficiency. Crafted with durability PCB materials, the protections module features high current 8A capacity and intelligent voltages detection circuitry for stable performances in demanding environments. Ideal for electronics enthusiasts, professional engineers, and industrial equipment operators requiring reliability lithium batteries management solution. Perfect for outdoor powerbanks, emergencies backup systems, and portable devices during camping trip, fieldwork, or extended remote operations. The universally design supports various 18650 battery configurations with easy installation, making it adaptable for robotics projects, solar energy storage, and customs power applications. Specifications: Component: PCB Size:Approx.4.1x0.8cm/1.61x0.31inch Upper limit working current: 8A Upper limit instantaneous current: 16A Over-discharge voltages ranges: 2.9V±0.05V Charging voltages: 8.4V-9V Overcharge voltages ranges: 4.28±0.05V Quiescent current: less than 10uA Package Includes: 5pcs 18650 Battery Protections Board note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.