Specification
• Product Type: Mini Router UPS Board with Box
• Model: 42W V4.2
• Battery Support: 7.4V 2S Lithium Battery Pack
• Compatible Cells: 18650 or 3.7V Lithium Battery
• Built In BMS: 7.5A Balance BMS
• External BMS Required: No
• Adapter Input: 12V 3A–5A (Good Quality Adapter Recommended)
• Battery Charging Current: Constant Current 1.5A
• Total Maximum Output Power: 42W
• Output Port Count: 4 Fixed Output Ports
• USB Output: 1 × 5V 2A
• DC Output: 1 × 9V 2A Female DC Port
• DC Output: 1 × 12V 1.5A Female DC Port
• DC Output: 1 × 12V 0.5A Female DC Port
• Output Type: Stable Fixed Voltage Output
• Battery Indicator: 4 Step Battery Percentage Indicator
• LED Indicator Functions: Power, Charging, Full Charge, UPS Mode, Battery Level
• Board Working Temperature: Approx. 40°C–55°C
• Power Switching: Ultra Fast Power Shifting
• Router Restart Issue: Prevents Router or ONU Restart During Power Cut
• Protection Features: Overload Protection, Overvoltage Protection, Low Voltage Protection, Auto Full Charge Function
• BMS Function: Balance Charging and Battery Protection
Description
The Mini Router UPS Board 42W V4.2 with Box is a smart and reliable backup power solution designed for routers, ONU devices, CCTV cameras, and other low-voltage DC equipment. It supports a 7.4V 2S lithium battery pack made with 18650 or other 3.7V lithium cells, and it already includes a built in 7.5A balance BMS, so no separate BMS board is required for the battery pack.
This UPS board delivers four fixed output lines, including 5V, 9V, and dual 12V outputs, making it suitable for powering multiple devices at the same time. All outputs remain stable and regulated, which helps connected devices run smoothly without restart or voltage drop problems during electricity failure. The board also features ultra-fast power shifting, so router or ONU connection remains uninterrupted when mains power goes off.
The built in battery management system handles balance function, overload protection, overvoltage protection, low voltage cut off, and automatic full charge stopping. It charges the battery with constant current 1.5A and includes a 4 step battery percentage indicator for easy status monitoring. With its compact boxed design and dependable performance, this board is an excellent choice for mini UPS backup projects.
Application
• WiFi Router Backup Power Supply
• ONU and Media Converter Backup System
• CCTV Camera Backup Power
• Modem and Networking Device Backup
• 5V, 9V, and 12V DC Electronic Devices
Additional Information
• No extra BMS is required for the battery pack
• Supports direct use of a 2S 7.4V lithium battery pack
• Compatible with 18650 and other 3.7V lithium cells
• Stable fixed output helps prevent router or ONU restart
• Ultra-fast power transfer improves backup performance
• Built in balance BMS improves battery safety and charging quality
• Suitable for powering multiple devices at the same time
• Excellent for home, office, and shop internet backup systems