Features: Engineered with a 3S1P 40A , this battery box delivers stable high current output for demanding devices while preventing overheating risks, ensuring stable backup power for energy intensive applications. The ABS enclosure offer superior ruggedness‌ resistance and drop protections, safeguarding internal circuits in harsh environments like construction sites or outdoor adventures. Ideal for electronics enthusiasts, professional managing multiple devices requiring consistent 12V power supply in mobilephone workstations . Perfect as emergencies energy source‌ for camping trips,or portable medical devices‌ needing uninterrupted, temperature regulated operations during extended use. Featuring tool-less modularity assembly, this general battery box simplifies installation for craft power projects while maintaining compatibility with diverse batteries configurations. Specifications: Scope of application: Suitable for batteries with nominal voltages of 3.7V and full voltages of 4.2V Charging voltages: 12.6V ~ 13.6V Continuous discharge current (upper limit): 40A Continuous charging current (upper limit): 20A Note 1: Successfully starting the electric drill requires 3 10C-20C power batteries, or 6 5C-10C power batteries. Suitable for: 12V router, security camera, video recorder, electric drill, fishing headlight, outdoor lighting Package Includes: 1PC battery protections board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.