This UPS Power Supply Box is designed to keep essential devices running when the main power is interrupted. It uses standard 18650 batteries in a DIY configuration and provides multiple output voltages that fit common small electronics. With easy install and lightweight, user friendly design, it is a practical solution for backups in home or small offices. Key benefits Provides backup power for critical devices during outages, helping reduce downtime and potential data loss. Flexible output options with USB 5V and selectable 9V and 12V to support a range of devices using a single unit. DIY 18650 battery compatibility allows easy battery replacement for longer runtime. Simple install process designed for straightforward setup and integration with existing equipment. Compact, durable enclosure suitable for placement near routers, DVRs, modems, or other small electronics. Key attributes Functionality: UPS style power supply with multiple output voltages to support low power devices during power interruptions. Compatibility: Intended for devices such as DVRs, wireless routers, and modems; uses 18650 battery configuration for the power source. Output: USB 5V output plus 9V and 12V output options to accommodate different devices. Battery: DIY 18650 battery configuration enables easy battery replacement for capacity. Size: Compact and portable enclosure designed for easy installation in a home or small office environment. Material and construction: Built with a robust enclosure to protect internal components during use and handling. Performance: Designed to deliver reliable backup power for compatible devices with simple operation and setup. Two to three specific use cases Use case 1: Keep a DVR powered during a power outage to protect ongoing recordings and prevent data loss. Use case 2: Maintain internet connectivity by keeping a wireless router and modem powered during outages, minimizing downtime and service interruptions. Use case 3: DIY power backup for a small home network or media setup by selecting appropriate 18650 cells to extend runtime and using the 5V/9V/12V outputs as needed. This product provides a practical and straightforward solution for maintaining essential electronics during power interruptions, with a DIY approach that leverages common 18650 batteries and versatile output options. It is designed to be easy to install and suitable for use with DVRs, wireless routers, and modems, offering reliable backup power in a compact form.