How to Make a Mini UPS for Wi-Fi Router | Fully Automatic Wi-Fi UPS | Wi-Fi Power Bank

Introduction

During load shedding, Wi-Fi routers turn off immediately, disrupting internet access. A mini UPS for Wi-Fi routers keeps your router ON automatically and works like a Wi-Fi power bank.

Project Overview

This fully automatic Wi-Fi UPS switches to battery power when electricity goes off and switches back to charging mode when power returns—no manual operation needed.

Components Required

• 18650 Li-ion Battery

• Battery Charging Module (TP4056 with protection)

• DC-DC Boost Converter (12V output)

• Auto Changeover Module

• DC Jack (Router input)

• Switch (optional)

• Wires and Enclosure

Circuit Explanation

• Charger keeps battery charged during mains supply

• Boost converter provides required router voltage (9V/12V)

• Auto changeover switches power instantly

• Router stays ON without interruption

Working Steps

1. Power ON: Router runs on adapter and battery charges

2. Power OFF: Battery supplies power automatically

3. Power returns: System switches back to charging mode

Features

• Fully automatic operation

• No internet interruption

• Compact and portable

• Rechargeable battery

Applications

• Home Wi-Fi routers

• Small networking devices

• Load shedding backup

Safety Tips

• Set correct output voltage

• Use protected charging module

• Avoid battery overheating

Conclusion

This DIY mini Wi-Fi UPS is a simple and effective solution for uninterrupted internet during power outages. It’s compact, automatic, and easy to build at home.

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