Knowing how to choose a power bank for your phone is an important step when just leaving the house for a day, much less planning a long or overseas journey. As overseas travelers are focused on connectivity more than ever before, a reliable, affordable power bank is a must-have for anyone setting out to explore faraway lands.

As you explore the various options for power banks, here are some key questions to consider when choosing a phone power bank:

  • How many devices will need a portable charge? How many ports do you need?
  • Do you want a device compatible with your phones fast charge capabilities?
  • Wireless, cord, or both charging?
  • How often do you expect to be away from easily accessible power sources?
  • Are there weight limitations involved with your baggage (for example, will you be hiking and carrying heavy gear and equipment during your travels)?
  • Do you have older devices that might present compatibility issues?
  • What is your budget?

Back to Top of How to Choose a Power Bank for Your Phone

About How to Choose a Power Bank for Your Phone

First, we’ll begin by explaining how a power bank works. A portable power bank stores electrical energy supplied by an outlet and allows you to “deposit” that energy later into a mobile device. Power banks have to be charged, sometimes for a considerable period of time, but will store enough electrical energy to fully power a device several times over. It should be noted that power banks will always experience loss due to resistance, so the full capacity of the power bank is not transferred to the device, and this is a factor when we calculate and estimate how many times a particular device can be charged. Additionally, the lower the charge on your device, the more the portable power bank has to work to recharge it. So, ideally, you do not want to wait until the device is fully depleted of battery life before using a portable power bank.

Almost any device that is USB charged can be used with a portable power bank provided you remember to keep the power bank charged! It is best to remove the power bank from the charge as soon as it is full and most have an LED indicator to display full capacity. Some come with an “auto cutoff” feature as well.

A general guideline for the charge provided by varying mAh batteries is as follows:

  • 1500 mAh: typically one full charge of a cell phone
  • 5200 mAh: typically two full charges of a cell phone and a tablet to 50%
  • 10000 mAh: typically four full charges of a cell phone and a tablet to 100%

Higher mAh units are available as well. These will be more expensive options, but possibly beneficial to those with numerous devices to charge during travel.
Environmental conditions can affect the lifespan of a portable power bank and you should keep this in mind as you decide to invest in one. For example, if you plan to travel for long periods of time in extreme weather conditions, this may have an impact on the long-term durability of the power bank you choose.

When deciding how to choose a power bank for your phone, check your devices for their battery capacity, which is measured in milliamp hours (mAh). As long as your portable power bank exceeds the mAh number on the device, you will get a full charge out if it, if not several. Be sure to consider if you plan to charge multiple devices. If this is the case, you will need a portable power bank with more than one output to charge the devices simultaneously. Obviously, these models can be more expensive, but they can also save precious time during travel.

You will also need to check compatibility with the portable power banks to make sure your devices are included or you can compare its specs to your existing charger. You do not want to find out in the midst of travel that your cable and the power bank produce a very slow charge. Additionally, the output voltage of the power bank should be equal to or higher than your device.

Recommended Phone Power Banks & Portable Chargers

A few recommended portable power banks for travelers and some of their key features are outlined below and at Best Power Banks for Your Phone.

Anker PowerCore 20100 Portable Charger

The Anker PowerCore intelligently identifies connected devices and can charge the iPhone 6s up to seven times, the Galaxy S6 up to five times, or the iPad mini 4 twice. Weighs 12.56 ounces and can simultaneously charge two devices. Comes with a portable charger, a Micro USB cable, a convenient and protective travel pouch, a welcome guide, and an 18-month warranty for users.

Read our review: Anker PowerCore 20100 Portable Charger Review

Anker PowerCore 20100mAh Portable Charger - Ultra High Cell Capacity Power Bank with 4.8A Output and PowerIQ Technology, External Battery Pack for iPhone, iPad & Samsung Galaxy & More Blue
45,175 Reviews
Anker PowerCore 20100mAh Portable Charger - Ultra High Cell Capacity Power Bank with 4.8A Output and PowerIQ Technology, External Battery Pack for iPhone, iPad & Samsung Galaxy & More Blue
  • The Anker Advantage:Join the 50 million+ powered by our leading technology.
  • Ultra-High Cell Capacity:Weighs as little as a can of soup (12.5 oz) yet charges the iPhone 8 almost seven times, the Galaxy S8 five times or the iPad mini 4 twice.
  • High-Speed Charging:PowerIQ and VoltageBoost combine to deliver the fastest possible charge (does not support Qualcomm Quick Charge). Recharges itself in 10 hours with a 2 amp charger, phone chargers (generally 1 amp) may take up to 20 hours.
  • Certified Safe:Anker's MultiProtect safety system and high-quality LG battery cells ensure complete protection for you and your devices.
  • What You Get:Anker PowerCore 20100 Portable Charger, Micro USB cable, travel pouch, welcome guide, our fan-favorite 18-month warranty and friendly customer service. USB-C cable and Lightning cable for iPhone/ iPad sold separately.

Hokonui Wireless Portable Charger

Hokonui Wireless Portable Charger is a top Amazon choice with rave reviews by most customers, many of whom claim it is the best portable charger they've ever used. Charge up to 4 Devices at once, supports fast charging on phones with the feature, charges itself quickly, in 4-5 hours, which is super fast compared to most other portable batteries.

Read our review: Hokonui Wireless Portable Charger

Bestseller No. 1
Portable Charger Power Bank, Hokonui 20000mAh External Battery Packs Quick Charge 3.0 with 3 Inputs & 3 Outputs Compatible for iPhone, Samsung Galaxy S9 Plus/S9/S8 Plus/S8, iPad and More 5647470064
  • 3A Charging Charge compatible devices at high speed with 5V 3A output, charge 3 USB-A devices simultaneously. Recharge your portable charger via Lightning USB-C or Micro USB, no more extra usb cables you have to carry, charge your device and recharge the power bank just by using 1 usb cable.
  • Large Capacity: 20000mAh of power charges iPhone XS Max almost 6 times, Samsung Galaxy S9 almost 5. 5 times, iPad Mini at least 3. 5 times and any other USB devices multiple times.
  • Strong Compatibility: Compatible with all 5V USB-powered devices including iPhone X/XR/XS/XS Max, iPhone 8/8 Plus/7/7Plus, Galaxy S9 Plus/S9/ S8 Plus/ S8, iPad, Nintendo Switch and other iOS and Android devices.
  • Smart and Safe: Stop charging when the device is full charged, prevent over-charging, overheat, short circuit and extend the service life of your phone. Led display will show the remaining power and will let you know when you should recharge it or when it is fully recharged.
  • 1 Year Time : 12 months quality assurance, New Replacement or Refund without Return in 30 days. We are committed to improving product quality and reducing product defects. If there is any quality problem, please feel free to contact us, we will do our best to providing you a pleasant shopping experience

Amazon Portable Phone Charger Best Sellers

Bestseller No. 1
INIU Portable Charger, USB C Slimmest & Lightest Triple 3A High-Speed 10000mAh Power Bank, Flashlight Battery Pack Compatible with iPhone 12 11 X 8 Plus Samsung S20 Google LG iPad etc. [2021 Version]
  • ✅【INIU’s Confidence】At INIU, we use only the highest-grade materials, so we do have the confidence to provide industry-leading 3 years warranty.
  • ✅【High-efficiency USB C】Equipped with the latest worldwide USB C charging standard, working as both input and output to not only let you fast refuel the charger, but perfectly fit your newest iPhone, Android and all upcoming USB C devices.
  • ✅【Triple 3A High-speed Charging】Outpace your mates and charge 1.4x faster through our exclusive UPower+ technology. After intelligently identifying your devices, it auto-adjusts the output up to 3A.
  • ✅【Ultra Slim 10000mAh】The thinnest 10000mAh power bank on the market, easily slips it into any of your pockets or bags. Enjoy the days’ worth of charging capacity, enough to top up iPhone 8 3.6 times, Samsung S8 2.3 times or iPad Air once.
  • ✅【Even Wider Compatibility】Unlike the market’s most power banks incapable of charging low-current accessories, INIU portable charger can work with not only all the phones, tablets but your smaller devices like AirPods, Bluetooth headphones, fitness trackers, smart watches, etc.
Bestseller No. 2
Portable Charger Power Bank 25800mAh, Ultra-High Capacity Fast Phone Charging with Newest Intelligent Controlling IC, 2 USB Port External Cell Phone Battery Pack Compatible with iPhone,Android etc
  • 2019 Latest Design Portable Charger with 25800mAh Ultra-Huge Capacity, adopts our advanced intelligent controlling IC, higher quality, safer and more reliable, powerful and longer-lasting life after 100% checked and continuous aging test;
  • Universal Compatibility -- The power bank compatible with iPad, iwatch, Airpods, Samsung Galaxy, most other Smart cell phones, Tablets, Bluetooth devices and more. It can charge 6 to 8 times to eliminate the anxiety of your battery exhaustion. Suit for travel, and other indoor outdoor activities;
  • Dual USB Charging & Fast Recharge -- The Dual USB ports (2.1A+1A) to charge your two devices simultaneously, Fully recharges itself in 8~12 hours with 2.1A input charger, or 12-24 hours with 1A charger;
  • 4 LED Lights & Certified Safe -- Four led lights show the current remaining power of the item(25%~50%~75%~100%), easily press the power button to turn it on or off. Built-in smart protection system, the USB battery pack ensures complete protection for you;
  • 24 Months Support Services -- Ekrist 25800mAh portable battery charger, Micro USB cables, user manuals. Together 2 Years friendly, easy-to-reach support! Any question, please kindly contact us.
Bestseller No. 3
2-Pack Miady 10000mAh Dual USB Portable Charger, Fast Charging Power Bank with USB C Input, Backup Charger for iPhone X, Galaxy S9, Pixel 3 and etc …
  • 【2-Pack 10000mAh Power Bank】Two 10000mAh battery packs not only for portable charging but also around the home. Allowing you charge mobile devices without having to be tethered to a plug socket. Each of them fully charges 2.4 times for iPhone X, 3.6 times for iPhone 8 and 2.2 times for Samsung Galaxy S9.
  • 【Dual Output & Input】Each has 2 USB output ports that detect all the connected devices and efficiently distributes the current output up to 5V 2.1A. The USB C and Micro USB ports can fully refill the battery itself in 5 hrs at 5V 2.0A.
  • 【Reliable Li-polymer Cell】Thanks to the Li-polymer battery pack, the charger is much safer than any Li-ion charger. Also, it's lighter and slimer that you can easily carry it around, even on airplanes.
  • 【Small & Slim】It feels incredibly compact for a 10000mAh power bank, weighing just 218g and only 14mm thick. Grippy design is easy to hold, easy to toss into a bag and incredibly portable.
  • 【What You Get】2 * Miady 10000mAh USB Portable Charger (White & Black); 2 * USB Cable; 1 * User Manual. We provide 24*7 friendly customer support and also back our products for 18 months.
SaleBestseller No. 4
Anker Portable Charger, PowerCore Essential 20000mAh Power Bank with PowerIQ Technology and USB-C (Input Only), High-Capacity External Battery Pack Compatible with iPhone, Samsung, iPad, and More.
34,715 Reviews
Anker Portable Charger, PowerCore Essential 20000mAh Power Bank with PowerIQ Technology and USB-C (Input Only), High-Capacity External Battery Pack Compatible with iPhone, Samsung, iPad, and More.
  • Ultra-High Cell Capacity: The massive 20,000mAh cell capacity provides more than 5 charges for iPhone XS, almost 5 full charges for Samsung Galaxy S10, more than 4 charges for iPhone 11, and over 2 and a half charges for iPad mini 5.
  • Advanced Charging Technology: Anker's exclusive PowerIQ and VoltageBoost technology combine to deliver an optimized charge to your devices, while the trickle-charging mode is the best way to charge low-power accessories.
  • Simultaneous Charging: Twin USB ports allow you to charge two devices at the same time. The USB-C port cannot charge other devices.
  • Versatile Recharging: With both a USB-C and Micro USB input port, you have more options over how you recharge. Recharging PowerCore with a 10W charger will take approximately 10.5 hours, while recharging with a 5W charger will take approximately 20 hours.
  • What You Get: Anker PowerCore Essential 20000, Micro USB cable, travel pouch, welcome guide, our worry-free 18-month warranty, and friendly customer service. (USB-C cable, Lightning cable, and wall charger not included)
Bestseller No. 5
2-Pack Miady 15000mAh Portable Charger, Power Bank/w Two 5V/2A USB Output Ports and USB C Fast Input, Portable Phone Charger Compatible with iPhones, Android Smartphones and More
  • 【Plenty of Capacity】With 15000mAh power capacity, an iPhone 11 can be charged to its full power 3.4 times, or a high capacity smartphone such as Samsung Galaxy S20 can be charged to its full power about 2.6 times. You can also plug in two smartphones for simultaneously juicing up.
  • 【Easy to Use】These power banks are smart enough to start/stop charging when a phone is connected/disconnected. With four LEDs denoting its remaining capacity, each indicates 0-25% capacity. You can check the power capacity by simply tapping the button.
  • 【Portable Insurance Package】Despite the huge capacity, these portable phone chargers still provide a great portable experience. Rectangular but slim, at 6 x 2.9 x 0.73 in, and it weighs just 11.6 oz making it a favorite for travel. You could benefit from these power banks on every road trip.
  • 【Safety Guaranteed】Built in high quality Li-ion battery helps to charge your phone safely and prevent over-voltage, over-charging, over-current, or short circuit, etc. Won’t get too hot or cause a lot of heat on the battery of your phone. These battery packs are also airline-approved so you can travel anywhere with them.
  • 【What You Get】2 * 15000mAh Portable Charger; 2 * Micro USB Cable; 1 * User Manual. We provide 24 * 7 friendly customer support and also back our products for 18 months. Please feel free to contact us.

Back to Top of How to Choose a Power Bank for Your Phone

Choose a Power Bank for Your Phone

Staying in touch with friends, family or work at home is a must for many globetrotters. Technology allows us to keep our loved ones connected to our journeys and we can share thrilling moments as they happen, thanks to smartphones and tablets. Since a smartphone or tablet is only as good as its battery life in many remote locations, where power outlets aren’t readily available for a quick charge, consider learning how to choose a power bank for your phone.

Back to Top of How to Choose a Power Bank for Your Phone

Cell Phone & Charger Guides

Cell Phone & Charger Guides

Home / How to Choose a Power Bank for Your Phone

Tech4Trek Comments
Follow Us

Learn How I Make Over $10K Per Month Publishing Websites

Long before the words Blogger, SEO, Wordpress or Digital Nomad even existed, I created websites that surpassed my six-figure income within one year and allowed me to work from home. Today, I am fully location independent, do work I LOVE and have total control over my schedule. Has entrepreneurship had it's ups and downs? Absolutely, and you can learn everything I know about how to build a sustainable business online, publishing websites about travel, your hometown, fitness, health and so many other niches. Learn all about How to Make Money Blogging, including how to know if it's the right career for you and how to quick launch your business.

I'll even show you how you can start totally free and not worry at all about which host, what domain name, a logo and all the other none sense most people waste their early time on that is frustrating and earns you zero income. You'll learn much of my SEO "secret sauce," completely legitimate tactics no one else is using. The course is being developed now, so sign up today (no spam, I promise) and be the first to know when I launch it at a special discounted rate.

Tech4Trek Discounts for Digital Nomads and Travelers

  • Note: If you join Google Fi through this link: Google Fi, we each receive $20 Fi credit.
  • ExpressVPN - use this link to sign up and we each get 30 days free!
  • Charles Schwab - pay NO fees for ATM withdrawals anywhere in the world and get reimbursed for those charged at machines. Use this link and you may get $100 when you become a Schwab client (** I don't know exactly how it works).
  • Chase Sappire Preferred Card - pay no foreign transaction fees, get 60,000 bonus points (about $750)
  • AirBnb - if you're new to AirBnb (is that even possible?), get $40 in travel credit on your first trip.