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Before an outage, charge your phone and backup power sources. Once the power is out, save battery for alerts and essential communication, and use a charged power bank or a compatible vehicle charger when it is safe to do so.
Prepare your phone and backup charging before an outage
If severe weather or another outage is expected, charge your phone, power bank, and other essential electronics while electricity is available. FEMA’s Get Tech Ready fact sheet and the CDC’s Charge Your Phone guidance recommend preparing devices in advance.
- Keep a charged phone power bank available; it is portable, but only useful if you charged it beforehand. The CDC includes power banks among emergency power supplies in its Power Sources guidance.
- Identify a compatible car phone charger as a backup and check that it works with your phone and its charging port. The U.S. Department of Energy recommends keeping spare batteries and a car charger for a phone in Keeping Mobile Devices Charged.
- Make sure you know how to receive local emergency alerts and have important contact information available if you cannot rely on your phone.
Conserve battery while the power is out
Use the phone for emergency alerts, essential messages, and necessary calls rather than routine browsing, video, or games. FEMA’s tech-readiness advice and the Department of Energy’s mobile-device guidance recommend reducing power use, including lowering screen brightness and closing apps you are not using.
- Lower screen brightness and shorten the time before the screen turns off.
- Close apps you do not need and avoid activities that keep the screen or network active.
- Turn on airplane mode when you do not need network access. Turn it off when you need to check for alerts, send a message, or make a call.
- Prefer text messages for non-urgent communication when networks are overwhelmed; FEMA notes texts may get through when calls do not. Limit non-emergency calls, as advised in the joint FCC and FEMA wireless-emergency guidance.
Choose a safe backup charging option
A power bank or compatible car charger can provide a way to recharge when household power is unavailable. Which is practical depends on what you have charged, whether the charger fits your phone, and whether you can use it safely.
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INIU 10000mAh 45W Fast Charging Portable Charger, Smaller Travel Power Bank
- 40% Smaller & Lighter Portable Charger: Powered by the industry’s first TinyCell high-density battery technology, this ultra-compact 10,000mAh portable charger power bank is 40% smaller and 36% lighter than conventional chargers. Whether you are an office user slipping a mini small portable battery into a purse for commuting, or a student looking for lightweight college essentials, you get powerful daily carry convenience without the extra bulk to keep you powered on the go.
- 45W Pro Speed Portable Phone Charger: This 45W fast charger boosts an iPhone 17 Pro Max to 76%, a Galaxy S25 Ultra to 84%, or an iPad Pro to 60% in just 30 minutes (charging from 20%). Whether you are a driver needing a quick portable charger for car, a commuter relying on a desk phone charger, or a gamer wanting a seamless Switch battery pack and Steam deck charger portable, you will spend less time tethered to a wall and more time enjoying your day.
- Detachable Cable for Multiple Devices: Unlike a standard portable charger with built in cable that becomes useless if the cord breaks, INIU's 0.4ft detachable braided USB-C cable can be swapped anytime to save your investment. It effortlessly transforms into a versatile travel charger for multiple devices, ensuring your family or group travelers always have a reliable portable charger for all cell phones to keep everyone connected without carrying messy cords.
- Airline-Safe Travel Essentials: This TSA-compliant, flight safe power bank provides nearly 2 full charges for your smartphone, making it the perfect battery pack flight safe for business trips, cruise vacations, and airplane travel essentials. Beyond flights, it empowers campers, hikers, and outdoor users with ultimate camping essentials and road trip essentials—so you can explore freely without battery anxiety, making it ideal gifts for travelers women and men.
- Trusted Emergency Backup: As the SAFE Fast Charge Pro trusted by over 38 million users, we ensure the safest charging with the highest-grade materials. When unexpected storms or hurricanes strike, it acts as a lifeline—providing a dependable power outage battery backup and emergency phone charger for emergency users.
| Option | What it depends on | Practical consideration |
|---|---|---|
| Power bank | A charged power bank and a compatible cable or connector | Portable and does not require a vehicle, but it needs to be charged before the outage. Emergency-supply guidance from the CDC includes power banks. |
| Vehicle charger | A compatible charger, a vehicle, and a safe place to use it | Useful as a backup if you can reach the vehicle after immediate danger has passed. If the engine must run, use a well-ventilated location; never run a vehicle in an enclosed garage. See Department of Energy guidance and FCC/FEMA guidance. |
Do not go to a vehicle while an immediate hazard is present. If you use a running vehicle to charge, keep it outdoors or otherwise in a well-ventilated place; never run it in an enclosed garage. The FCC and FEMA also advise waiting until danger has passed before going to a car.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Protect the phone from heat and electrical problems
Avoid excessive heat while charging
Follow the phone maker’s temperature and charging instructions. Apple says not to charge an iPhone when ambient temperature is above 95°F (35°C), because doing so can permanently reduce battery lifespan. Apple also says cold can temporarily reduce battery life. This temperature guidance is specific to iPhone; do not treat it as a universal limit for every phone. See Apple’s battery guidance.
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ZZI Portable Charger Power Bank 60000mAh, 22.5W PD Fast-Charge Battery Pack
- Huge Capacity 60000mAh Power Bank: ZZI portable charger features a new high-density polymer battery that provides 10 charges for iPhone 15, freeing you from battery anxiety. Compatible with almost all types of smart devices on market including iPhone 17/16/15/14/13/12 Series, iPad, Samsung, Google Pixel series, Switch, and other Android phones and tablets.(IMPORTANT: 60000MAH PORTABLE CHARGER ARE NOT ALLOWED ON AIRPLANE)
- Charge 5 Devices Simultaneously: Portable charger power bank comes with a 3-in-1 high-strength nylon braided cable (Type-C / iOS / Micro USB) that has passed over 10,000 folding and plug-in/unplug tests, ensuring long-term durability and wear resistance. Charge up to five devices at once—suitable for home, travel, camping, hiking, vacation and outdoor trips
- 22.5W Super Fast Charging & Battery Protection: The battery charger can charge your iPhone 15 to 60% in just 30 minutes — 3 times faster than a standard portable phone charger. Built-in smart recognition chip automatically adjusts power output for different devices, delivering efficient and safe charging that protects your battery—so you can enjoy worry-free charging every time
- Ultra Compact & Smart LED Display: With its massive 60,000mAh capacity, ZZI battery bank provides long-lasting power without feeling bulky. Measuring only 5.8×2.9×1.1in, its size is similar to an iPhone 15, about twice the thickness, striking an ideal balance between capacity and portability. The LED digital display of portable battery shows the remaining battery in real time, allowing precise control over every charge
- Reliable 5-Layer Safety Protection: The battery pack portable charger features overcharge, overcurrent, overdischarge, overvoltage, and short-circuit protection, keeping your devices safe at all times, giving you complete confidence with every charge. What You Get: 1* power bank, 1* 3-in-1 USB cable, and 1* user manual
Separate surge protection from phone charging
A surge protector helps protect household electronics from electrical surges; it does not charge a phone or replace a power bank. The American Red Cross recommends surge protection and unplugging electronics during an outage to reduce the risk of overload or damage from surges. See Power Outage Safety. Keep this household electrical precaution distinct from your portable phone-charging plan.
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Rank #4
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OHOVIV Portable Charger Power Bank 50000mAh,PD 22.5W Battery Pack
- Huge Capacity 50000mAh Portable Charger - The 50000mAh power bank ultra-high massive capacity will keep your phone and other device running for many days！Without extra worry about low phone battery. Ideal for traveling, camping and hiking.
- Latest PD 22.5W High-Speed Charging - OHOVIV 50000mAh Portable phone charger adopts the latest Super Charger Protocol and Fast Charger Protocol with 22.5W output USB-C port.Support QC4.0 QC3.0 huge capacity power bank with fast charging, it only takes 30 minutes to charge your iPhone 14 from 0% to 55%.（NOTE: The 50000mAh PORTABLE CHARGER ARE NOT ALLOWED ON AIRPLANE！！）
- Power 3 Devices at Once - Cell phone external battery pack is equipped with 2 USB-A (22.5W output) ports, 1 USB-C (18W input/22W output) port and 1, and it can charge three devices at the same time. The portable power bank is universally compatible with all products via USB charging cable, including all iOS and Android smartphones, watch, bluetooth headsets and so on.
- LED Digital Display & Compact Design - OHOVIV 50000mAh Cell phone portable charger comes with smart LED digital display, accurately keep track of remaining juice, allowing you to easily operate your power.Our battery pack charger portable is 13.4*7*3.4cm（5.27*2.75*1.33in）, and weigh 613g (21.6oz), which is easy to carry.
- Safe Powerful Phone Charger - OHOVIV 50000mAh portable charger power bank with premium Li-polymer battery, this portable battery charger can charge your devices multiple times.Battery bank adopt smart chips to prevent overcharge, overvoltage, overcurrent, and short circuit to ensure customer safety.
Rank #3
2026 2-Pack 10000mAh Portable Charger Battery Pack with Built in Cables
- 【Charge 4 Devices Simultaneously】Total 4 output ports (built-in 2 cabls,IOS cable and USB-C cable and 2 USB A), supports charging for 4 smart devices simultaneously, All in one portable charger, you would not need to carry various cables or adapter any more, save you time and no more waiting.
- 【Universal compatible with All popular devices】As portable phone charger builts in all ports, multi cables, it is widely compatible with all popular cellphones or tablets. Widely compatible with iPhone 16/15/14/13/12 Series, compatible with Samsung S22 S21 S20 A52 A32 Z fold series Z flip series and compatibel with Google Pixel series and other android phones tablets, etc...
- 【Super Slim, Accurate Percentage of Remaining Juice】 Slim 10000 power bank, its dimmension is 5.83'' x 2.68'' x 0.63'', and weigh only 1.19lb, portability just like a lighter cell phone, easily take it anywhere on the go. With digital led display feature, no more hassle of guessing the remaining battery and you can recharge battery pack in time conveniently. A best portable charger for all people.
- 【Airline Approved & Ultimate Travel Companion】 Take it anywhere! This 10000mAh power bank meets all major airline carry-on regulations. Its incredibly slim profile and built-in cables eliminate bulk and tangled wires, slip it effortlessly into your pocket or bag. Perfect for hassle-free power on flights, road trips, or daily commutes. Your essential on-the-go power solution!
- 【Reliable Security】: This portable power bank has 10 built-in cryogenic IC ice cores and multiple system protection, intelligent monitoring of voltage and current to actively avoid a series of potential dangers such as overcharge, overdischarge, short circuit and high temperature. Let you use it without worries.
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