Power gone, router dead? A power bank can save your home Wi-Fi!
If the Wi-Fi suddenly disappears, it’s not always the internet provider’s fault. Sometimes the culprit is a simple power outage. All it takes is a brief interruption for your router to restart or go totally offline. This is especially frustrating during important video calls or right in the middle of a critical update. The easy fix? A power bank as an emergency power source. Here’s how it works: Wi-Fi crash due to power failure? A power bank can helpThe Green Cell Power Bank is a powerful option with 20,000 mAh capacity, pass-through charging, and Power Delivery support.Green Cell Routers need surprisingly little power–usually only 6 to 12 watts. A standard power bank with 20,000 mAh (≈100 Wh at five volts) can keep your router alive between six and 12 hours depending on the model. That’s enough for a power failure or a mains-related restart.Important: The power bank should support Power Delivery (PD) and supply an adapter cable that passes the required nine to 12 volts to the router. DC barrel (or hollow) plugs are common.Most AVM Fritzboxes require 12 volts via round plugs, so a simple USB-C connection won’t work. A PD to DC cable with an integrated voltage converter can help. A suitable power bank with PD output is, of course, required. Recommended USB-C to DC cables available on Amazon:HUNSOOL USB C to DC cableSupports 5V, 9V, 12V, 15V, and 20VCompatible with USB-C PD chargersIncludes 8 connector tipsCable length, 3.9ftSinLoon PDSupports 5V, 9V, and 20VCompatible with USB-C PD chargers and power banksFeatures DC 5.5 x 2.1 mm barrel connector inputDurable nylon braided cableCharge and power simultaneously with pass-through power banksIt’s even more practical with a power bank that supports pass-through charging. These models can charge themselves while simultaneously powering a connected device (like a router). This setup is perfect for continuous operation on the shelf. In the event of an unexpected power failure, the Wi-Fi stays “alive” without any extra effort.A small investment for a big peace of mindA good power bank isn’t just practical for your smartphone, it can also save your Wi-Fi in an emergency. Even during a power cut, you can stay online if you have the right cables at home. If you work from home, need to be reachable, or require a reliable internet connection, an (inexpensive) power backup can quickly pay for itself.Bonus tip for tech enthusiasts: If you want a particularly elegant solution, install a small UPS (uninterruptible power supply) with a DC output. However, for most cases, a good power bank with at least 20,000 mAh and suitable connections is more than enough.
Routers consume surprisingly little power, typically between 6 and 12 watts. A standard 20,000 mAh power bank, like the Green Cell Power Bank known for its capacity and Power Delivery (PD) support, can keep your router running for six to twelve hours, depending on the specific model. That's often more than enough to weather a power failure or a mains-related restart.
The key is ensuring your power bank can deliver the correct voltage to your router. Most routers, including popular AVM Fritzboxes, require 9 or 12 volts supplied through a DC barrel plug (also known as a hollow plug). A simple USB-C connection from the power bank won't work in these cases. Instead, you'll need a USB-C to DC cable with an integrated voltage converter.
Several options are available online. For example, the HUNSOOL USB C to DC cable supports various voltages (5V, 9V, 12V, 15V, and 20V) and comes with multiple connector tips for compatibility. The SinLoon PD cable also supports 5V, 9V, and 20V and features a durable nylon braided design.
For even greater convenience, consider a power bank with pass-through charging. These models can simultaneously charge themselves while powering a connected device, like your router. This allows you to keep the power bank constantly plugged in and ready to go. In the event of a power outage, your Wi-Fi will seamlessly remain online without any manual intervention.
Investing in a good power bank isn't just for charging your smartphone on the go. It's a practical solution for maintaining a stable internet connection during power interruptions. If you work from home, rely on a constant internet connection, or simply want peace of mind, a power bank backup can quickly prove its worth.
For tech enthusiasts seeking a more sophisticated solution, a small UPS (uninterruptible power supply) with a DC output is an option. However, for most users, a