Will Your Cell Phone Work During a Power Outage?

Your cell phone will usually continue working during a power outage, at least for a while. Cell towers often have backup batteries or generators that keep them operating when electricity fails. But that backup power isn’t unlimited, and not every tower has the same protection.

During a widespread blackout, you might still have a fully charged smartphone but no way to make a call. Cell towers can lose power, network connections can fail, and heavy call traffic can overwhelm the remaining service.

There are ways to improve your chances of staying connected. Some involve how you use your phone, while others require a little preparation before the power goes out.

One useful emergency communications backup is a battery-powered weather radio that can also charge a smartphone. The Midland ER310PRO receives AM/FM and NOAA weather broadcasts and includes a 10,000 mAh rechargeable battery with a USB charging output. It gives you another source of information if cell service goes down, along with some backup charging capacity.

As an Amazon Associate I earn from qualifying purchases. There is no extra cost to you.

→ Midland ER310PRO Emergency Radio

Will Cell Towers Work During a Power Outage?

Most cellular networks are designed to tolerate at least some loss of utility power. Many cell towers have batteries, generators, or both. How long they can operate depends on their equipment, backup capacity, and the availability of fuel.

A tower with battery backup might continue working for several hours. A site with a generator and sufficient fuel could operate considerably longer.

However, the entire cellular network needs more than electricity at the nearest tower. Its connections to other network equipment must also remain operational.

For example, your neighborhood tower might have backup power, but a damaged fiber-optic connection could still knock out service.

During a major storm, flooding, widespread electrical failure, or other disaster, some towers may continue operating while others go offline.

Why Cell Service May Get Worse as an Outage Continues

Here’s something to consider.

Suppose several cell towers serve a particular area. After a major power failure, some towers lose service while others remain operational.

Phones that would normally connect to the failed towers may attempt to connect elsewhere. The remaining network becomes busier, and coverage may become unreliable.

I remember visiting my dad when the power went out during our stay. He had an old flip phone that normally showed a full signal. After the outage, it showed only one bar. I suspect his usual nearby tower had lost power, and the phone was connecting to a more distant tower instead.

Even without tower failures, a large emergency can create unusually heavy traffic. Lots of people are trying to contact family, check on friends, or find information.

You might notice calls failing, messages being delayed, or mobile internet becoming unusually slow.

Having signal bars doesn’t necessarily mean the network is working properly.

How to Communicate When Cell Service Is Unreliable

If your phone still shows a cellular signal but voice calls are failing, don’t give up immediately. Other methods may still work.

Try Text Messaging Instead of Calling

A regular SMS text message uses much less network capacity than a voice conversation. During periods of congestion, a short text may get through even when a call won’t connect.

Keep the message brief and useful.

For example:

“I’m okay. Power is out. Staying home. Will check in again tonight.”

Remember, though, text messaging still requires a functioning network unless your phone supports a separate satellite messaging service.

If the cellular network is completely unavailable, ordinary SMS messages won’t get through.

Use Wi-Fi Calling If Your Internet Still Works

Wi-Fi calling allows a compatible smartphone to make calls and send supported messages through an internet connection rather than relying entirely on the cellular radio network.

This could be useful during a local cell tower outage.

But there’s a catch.

Your home internet connection must still be working. Your modem, router, and any other necessary networking equipment also need electricity.

A cable or fiber connection may fail during an outage even if you’ve powered your equipment with a UPS. Fixed wireless or satellite internet may offer another route, provided the service remains available.

Enable and test Wi-Fi calling before an emergency. Availability depends on your phone and carrier.

Can Your Smartphone Communicate Without Cell Towers?

This is one of the biggest changes since I originally wrote this article in 2016.

Certain modern smartphones can communicate directly with satellites when cellular and Wi-Fi networks aren’t available.

For example, Apple’s Emergency SOS via satellite is available on supported iPhone 14 and newer models. It allows people to contact emergency services when ordinary communications aren’t possible.

Apple also introduced Messages via satellite for supported iPhones, allowing ordinary text conversations in supported regions.

Some Google Pixel phones and other Android devices have satellite emergency capabilities as well.

However, satellite communications are not available on every smartphone. Features vary by device, carrier, software version, and location.

You generally need to be outdoors with a relatively clear view of the sky. Trees, buildings, mountains, and other obstructions can interfere with the connection.

Satellite messaging may also take longer than ordinary texting.

Important: Emergency satellite SOS is different from ordinary satellite messaging. Don’t assume that a phone supporting one service automatically provides unrestricted access to the other.

Check your particular phone’s capabilities ahead of time. Some models offer a satellite connection demonstration that lets you practice without actually contacting emergency services.

That would be a worthwhile thing to learn before you need it.

How to Keep Your Smartphone Charged During a Power Outage

Of course, none of these communications methods will do much good if your phone battery is dead.

Back during Hurricane Sandy in 2012, there were plenty of stories and photographs of people searching for places to recharge their phones. Some gathered around temporary charging stations, while others traveled considerable distances looking for working electrical outlets.

Fortunately, keeping a smartphone charged during an outage is fairly easy if you’ve planned ahead.

Keep a USB Power Bank Charged

For most people, this would be my first recommendation.

A USB power bank is a rechargeable battery that stores electricity for charging phones and other small devices.

A compact 10,000 mAh model is convenient to carry, while a 20,000 mAh power bank provides roughly twice the rated battery capacity.

I have an Anker 10,000 mAh unit, and I always take it with me during trips and long travel, just in case. I also keep the charging cords that I may need with it. It all fits very nicely and compact in a little Faraday bag that I bought for this purpose.

The actual number of phone recharges depends on the phone’s battery size, charging efficiency, and how much energy remains in the power bank.

A good portable option is the Anker 10,000 mAh USB-C Power Bank. Its size makes it practical for everyday use as well as emergency preparedness.

→ Anker 10,000 mAh USB-C Power Bank

One suggestion: don’t store a power bank for years and assume it will still be fully charged when you need it.

Check its charge periodically, and make sure you have the correct cable for your phone.

Recharge Your Phone From Your Vehicle

A vehicle can provide a useful source of emergency charging power.

Many newer vehicles have built-in USB ports and wireless charging pads (my Subaru has one of these). Older vehicles can use an inexpensive USB charger plugged into the 12-volt accessory outlet.

You don’t need a large generator just to recharge a phone.

Larger Power Banks and Portable Power Stations

If you want more charging capacity, a 20,000 mAh power bank is a reasonable step up.

For example, Anker offers a 20,000 mAh model with a built-in USB-C cable.

→ Anker 20,000 mAh Power Bank (Amazon)

For an extended outage, a portable power station offers considerably more energy storage. Even a relatively small unit can recharge smartphones many times.

→ Jackery Explorer 500 v2 Power Station (Amazon)

What About Solar Chargers and Hand-Crank Radios?

Small portable solar panels can recharge phones or power banks, provided there’s sufficient sunlight and the charging equipment is compatible.

I would generally favor charging a power bank from the solar panel, then charging the phone from the power bank. This provides a more stable charging source when sunlight is changing.

👉 Folding Solar Panel Phone Charger For When The Power Is Out

Some emergency hand-crank radios also include USB charging ports.

They’re useful as a last-resort option, but don’t expect much energy from a few minutes of cranking. Their primary value is receiving emergency radio broadcasts, with phone charging as a secondary feature.

How to Make Your Phone Battery Last Longer

Suppose you’re in the middle of a widespread outage and have no immediate way to recharge your smartphone.

Your goal should be to conserve the battery while keeping the phone available for important communications.

Here are several things that can help:

• Enable Low Power Mode or Battery Saver. These features reduce background activity and other power demands.
• Reduce screen brightness. The display can consume considerable power, especially at high brightness.
• Avoid unnecessary video streaming and browsing. Save your battery for communications and important information.
• Disable services you don’t need. Personal hotspots and other wireless features can consume additional energy.
• Use downloaded information. Offline maps, saved contacts, and important documents remain useful without an internet connection.
• Limit unnecessary checking. Repeatedly waking the screen to check for service uses energy.

A Weak Cell Signal Can Drain Your Battery

This is particularly important during a regional power outage.

When your phone has a poor signal, it may use additional power trying to maintain a connection. If there’s no service, it may repeatedly search for an available network.

Battery consumption can increase considerably under these conditions.

If service is completely unavailable, consider temporarily enabling Airplane Mode and checking periodically to see whether cellular service has returned. Or, shut off the phone, wait awhile, and then check again later.

Have a Communications Backup That Doesn’t Depend on Cell Towers

I wouldn’t rely entirely on a smartphone during a serious regional disaster.

Even with a full battery and backup charging equipment, you’re still dependent on functioning communications infrastructure.

A simple battery-powered AM/FM radio can provide news and information when cellular service is unavailable. A NOAA Weather Radio is useful for receiving weather warnings.

For local two-way communications, FRS and GMRS radios are another possibility.

These radios can communicate directly with other nearby radios without using cellular towers or the internet. Their effective range depends heavily on terrain, antennas, and surrounding obstructions.

GMRS repeaters can extend that range, although repeaters also need electrical power.

👉 GMRS Emergency Channel: Which Channels Should You Monitor?

I’d also suggest making a simple family communications plan. Decide who you’ll contact, how often you’ll check in, and what you’ll do if nobody has cellular service.

Keep important telephone numbers written down. You may not always have access to online contacts or cloud services. This is an interesting issue. I’m old enough to remember the days when I had to remember phone numbers. Nowadays it’s all in the phone. If that phone is down, you lose your contact information. It’s worth writing some of this down for important contacts.

A power outage doesn’t necessarily mean your cell phone will stop working. It may continue operating normally for hours, or service could disappear almost immediately if nearby communications infrastructure is damaged.

Keep your phone charged, have at least one backup charging method, and understand its communications options before the lights go out.