What you need to know about Power Banks

Power bank

Power banks are utilized to provide portable power for devices that use a USB interface, such as mobile phones, which require battery power. They can be charged wirelessly or by USB.
Power Banks Include:

Wireless charging Power bank

With the increasing use of battery operated equipment, power banks are becoming more common. Power banks can be used to charge everything from portable speakers, Mp3 players, battery powered headphones and even cell phones. These chargers double as portable chargers. They just need to have a USB charging interface.

As you can see, power banks are available in a variety of sizes and shapes to accommodate all types of people.

Power banks have become very popular in recent years as people realize how convenient they can be for charging smartphones and other electronic devices when they are powerless. For those that need to be able to charge their devices wirelessly, there are power banks that are being developed.

Definition of power bank

Powerbanks, are defined as portable batteries that make use of circuitry to regulate power in and power out. They are able to charged up using a USB charger when power is available, and then used to charge battery powered devices such as mobile phones and a number of other devices that would usually make use of a USB charger.

A financial bank with the name of power bank could be likened to a bank, where funds can be deposited, stored and withdrawn as needed. Portable chargers are sometimes used to refer to items like mobile phones, because they can be charged from a mains source, but they also need to be charged, which will normally require a mains charger.

Types of power banks

You can choose from a variety of power bank portable chargers. Clearly the size is one of the primary criteria, but there’re several more categories which could be thought of.

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The following are the most common types of USB power banks:

Universal or standard power bank:

You can easily find these power bank portable chargers at your local store or online. They can be charged just like regular USB chargers, by using the USB ports that are found in most computers.

These power banks will typically charge from a regular USB charger and you will see an indication of the state of charge on the power bank. This can be a simple alphanumeric display or perhaps a row of tiny LED lamps that shows the charge level as a percentage of the full charge. The power connection is typically supplied by a micro USB connector.

The power bank may be used to charge other gadgets once it has been fully charged. Depending on the power bank, there may be several Type A USB sockets that can be used to charge the devices.

Bank of solar power:

These solar power banks are able to charge up using the sun’s energy, as the name implies. They use photovoltaic panels to accomplish this. These devices can only be used to ‘trickle ‘charge the internal battery when they are exposed to sunlight, and since the solar cells are so small, this is only a useful function, but it can be very useful in bright or sunny weather.

A solar powered power bank

It may also be charged in a normal way by using the solar energy for a slow trickle charge.
They can be charged from a USB charger, since solar charging is rather slow. When you are traveling away from the main power source, solar charging can be a good backup.

To make sure that the highest amount of solar power could be converted, a few of the more advanced solar banks have solar power panels that fold out to present a bigger area to the Sun. But it can take up to 24 hours to charge, and that’s because the sun is so intense at night, or during the day, it can take quite a while.

Since charge times, capacities, etc vary considerably, it’s usually better to take a good look at the figures, if there’s a chance of purchasing one.

These solar powered power banks are similar to the standard wired power banks, except for the fact that they use standard Type a USB plugs for the output or output, and also have a micro USB port for charging A USB charger.

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What is a wireless power bank The power bank industry has taken this concept a step further by incorporating wireless charging technology into devices such as cell phones, earpods and even laptops.

Powerbanks can be charged from a regular USB source, but they will also be able to wirelessly charge phones or other wireless charging compatible electronics.

Wireless charging power bank

These power banks are compatible with the Qi standard, which is used by nearly all electronic devices that are able to charge wirelessly. The device to be changed needs to be positioned on the power bank, so follow the instructions carefully. Once the wireless charging capability is activated, a button has to be pressed to turn on the charging function.

It’s advisable to switch off the wireless charging power bank as soon as the charging is completed after which the wireless charging circuitry is turned off and the power bank won’t be discharged unnecessarily.

Power bank – lifetime

Power banks are associated with two different types of lifetime.

Cycles of charge discharge

Any battery that is rechargeable will eventually wear out. Usually, the life of a battery is expressed in terms of how many charge discharge cycles a battery can go through before reducing its performance by a certain amount.

Some less expensive power banks might just have a life of 500 or so charge discharge cycles, but much better ones will have lifetimes of many more charge discharge cycles.

Time of self

Discharge: All batteries, whether primary or rechargeable, have a certain amount of self – discharge. For rechargeable batteries nowadays with their own control circuitry, a tiny amount of energy is needed to keep these circuits alive. Consequently there’s only a finite time that a battery is going to remain charged.

A good power bank is able to keep charge for as much as six weeks with just a modest loss of charge, but lower quality ones may just keep a useful charge for about a month. These figures are stored at room temperature, but their performance is greatly diminished when they are stored outside of these temperatures.

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Power bank charge and current capabilities

As the need for storage of charge has increased, the amount of charge that may be stored in power banks has also increased. Smartphones are among the main items to be charged by them, and n the recent past the battery capacities have increased considerably to supply longer times between charge.

Some of the older power banks were able to provide up to 1000mA hours, while the newer models can provide up to 25000 mA.

Not only is the current delivered by them large. They can often deliver 2.5A which allows them to quickly charge many electronic devices.

Battery technology developed by Power bank

Rechargeable batteries are what you find in power banks, and they are all based on lithium. Lithium-Ion and Lithium-Polymer batteries are generally used for power banks but do not be shocked if other types start to enter the market before long.

Many of the recent developments in battery technology are due to its key role. from mobile phones to electric automobiles, and as a result it’s quite likely there’ll be some spin offs into power banks.

The currently used two technologies have slightly different properties:

Lithium ion:

Lithium-Ion batteries are more expensive to manufacture but can store more energy than a regular battery, and can store more charge at a given time.

Polymer – lithium:

Polymer power banks are a better choice because they don’t suffer from the same ageing issues as lithium-polymer power banks. They are more expensive to manufacture and therefore may not be suitable for all budgets. Often it is better to spend less than you think is necessary, especially if they’re likely to be lost.
Power banks come in two varieties, and either one is fine, but you need to find a balance between performance and cost.

The portable chargers that are available from a power bank are very useful because they allow you to charge your battery while traveling. Because it’s not always easy to get to a mains power point each time a cell phone or some other battery powered item needs charging, these power banks are have now become an established product as well as they’re extremely helpful, particularly when travelling.


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