How Power Banks Work and Are Used

girl using laptop being charged by goal zero powerbanks

How many times has your phone died while you were out and about? It is a frustrating experience, especially if you're in the middle of an important conversation or traveling. 

A power bank is a portable device that stores electrical energy in a rechargeable battery and provides power to electronic devices. It usually consists of a rectangular block with one or more USB ports, an LED battery indicator lights, and an input for charging the battery. Power banks come in all shapes and sizes and can be used to charge phones, tablets, laptops, cameras, and other electronic devices. 

To better understand the use of power banks, we will discuss how it works and provide some tips on choosing the right one for your needs.


A power bank is a small, portable charger that can power up your smartphone, tablet, or other USB-charged devices when you're away from an outlet. Power banks are becoming an increasingly popular option for people on the go that serve as portable power stations for gadgets. There’s no need to worry about your devices running out of juice, even if you're in the middle of nowhere.

Most power banks use lithium-ion batteries, which are the same type of batteries used in many electronic devices. These batteries can hold a charge for days, so you can always be sure you have a backup power source when you need it.

Power banks work by storing energy in their batteries, which charge electronic devices. When the power bank connects to a device, it will begin transferring its stored energy to the device. Power banks typically use USB ports to connect to devices, though some may also have wireless charging capabilities.

goal zero sherpa 100PD


Portable Power Banks

These power banks are designed to be used as portable power stations and are easy to carry around. They usually have a small form factor and can fit easily in a pocket or bag. Many portable power banks also come with built-in or shorten cables, so you don’t have to worry about carrying extra cords.

High Capacity Power Banks

If you need a lot of charge for your devices, then a high-capacity power bank is likely the way to go. These power banks typically have 20,000mAh or more power like our Sherpa 100PD (25,600mAh), enough to charge most smartphones several times over fully. Many high-capacity power banks also come with multiple USB ports and USB-C Power Delivery ports so that you can charge multiple devices simultaneously.

Wireless Power Banks

Wireless power banks are becoming increasingly popular as more devices support wireless charging. These power banks allow you to charge your devices without plugging them in. Just place your device on top of the power bank, and it will start charging. 


Phones have become an integral part of everyday life for everything from entertainment to navigation. The popularity of the power bank only continues to increase to meet these needs.

However, with so many different types and brands of power banks on the market, how can you know which one is right for you? There's a few things to keep in mind when choosing a power bank:


One of the most important factors to consider when choosing a power bank is capacity. It is measured in milliamp-hours (mAh) and will determine how much charge the power bank can hold. A lower-capacity power bank will suffice if you only need to charge your phone once or twice. However, you’ll need a higher-capacity power bank if you need to charge your phone multiple times or use the power bank to charge other devices, such as a tablet.


Another essential factor to consider is output. It is measured in volts (V) and will determine how quickly the power bank can charge your devices. Most phones and tablets will charge with a 5V output, and the higher amperage will impact the speed at which they can recharge. Some newer devices can now recharge via USB-C power delivery this allows for a high voltage and amperage for faster recharge times.


Most power banks come with one or more USB ports that you can use to charge your devices. However, not all USB ports are created equal. Some power banks have standard USB ports that can be used with any device, while others are beginning to switch to USB-C power delivery for faster recharges


If you're looking for a power bank that is durable, affordable, packed with features, and can be used as a portable power station, then Goal Zero is a great option to consider. Here are some of our most reliable power banks.

Goal Zero SHERPA 100AC

sherpa 100ac

If you're looking for a reliable and travel-friendly power bank, this 95-Watt Hour power bank is airline-approved This 95-watt hour power bank can charge various devices, including phones, cameras, and even MacBooks. It features Qi wireless charging and 60WA USB-C charging, so you can always keep your devices powered up no matter where you're headed.

Goal Zero SHERPA 100PD

sherpa 100pd

The Goal Zero SHERPA 100PD is the best buy if you're looking for a reliable power bank to keep up with your busy lifestyle. With 95 watt-hours of power, it can easily charge your USB-C laptops, tablets, phones, and mirrorless cameras. During action-packed days, it can help you make the most of your precious time. If you're looking for a portable power station that can help you stay charged and connected, the Goal Zero Sherpa 100PD is an excellent investment.


Goal Zero power banks are some of the most reliable and durable today. They are perfect for people who need a dependable power source when away from home or the office. Goal Zero power banks are some of the most reliable and durable today, perfect for people who need a dependable power source when away from home or the office. Our power banks are more than just a power source - we’ve taken extra care with the details:

  1. They're built tough. Whether you're looking for a power bank to take on your next big adventure or one that can withstand the rigors of daily life, Goal Zero has you covered. power banks are constructed from durable materials and designed to withstand drops, bumps, and other potential damage.
  2. They're packed with features. In addition to providing reliable backup power, Goal Zero power banks also come loaded with helpful features like USB-C Power Delivery, Qi Wireless charging,  LED flashlight, solar charging capabilities, and more.
  3. They offer great value. For all that they offer in terms of quality and features, Goal Zero power banks are priced competitively.

Whether you're looking for a rugged and reliable power bank for your next big adventure or one that can help you get through a power outage, Goal Zero has you covered. Choose us for your backup power needs, and rest assured that you're getting the best possible product. Visit our website to learn more.

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