WiFi Router Mini-UPS Battery Backup Calculator (WFH Essential)
Do not lose internet during brief power cuts or inverter switchover delays. Enter your WiFi optical ONT / router voltage (9V/12V) and current (1A/1.5A/2A) to calculate required mini-UPS battery capacity (mAh) for 4 to 8 hours of uninterrupted work.
Uninterrupted broadband for 12V 1.5A router on 8000mAh Mini-UPS.
Never get disconnected during live client calls or VPN sessions. A mini-UPS powers the router directly with DC electricity, avoiding inverter relay restart trips.
Router Power Specs (Look at Router Adapter Label)
Select Mini-UPS Battery Size
8000 mAhPopular brands in India include Oakter Mini UPS, Artis AR-MINIDC-3, and Qubo Smart Cam UPS. All come with DC split cables and 9V/12V selector switches.
How This Calculation Works & Technical Formula
How to use this tool:
- Look at the power adapter label on your WiFi router (usually 12V 1A or 12V 1.5A).
- Select router voltage and current rating.
- Choose mini-UPS capacity (e.g. 6000mAh, 8000mAh, 12000mAh).
- Get estimated uninterrupted broadband uptime during outages.
Frequently Asked Questions
Why does my WiFi drop for 10 seconds when power goes off if I already have an inverter?+
Most standard home inverters have a switchover delay of 10 to 20 milliseconds when mains power drops. While lights and fans continue running, sensitive broadband routers reset instantly. A dedicated DC mini-UPS provides zero-millisecond switchover.
Other Power Backup Calculators You Might Need
View All 10 Tools →Inverter Size Calculator
Find the exact Inverter VA rating required for your home appliances
Battery Backup Time
Calculate exact backup hours & minutes based on battery Ah & running load
Battery Charging Time
Know charging hours & electricity bill units consumed per full charge