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Home > Mobile Phone Accessories > Chargers > Power Banks: Portable USB Battery Packs

Power Banks: Portable USB Chargers

Batteries seem to run out of power when there's no power outlet around and you need to use your smartphone or tablet. That's when a portable battery pack can help. Portable battery packs are like a tank of battery power that you charge and use in emergencies by plugging in your smartphone or tablet in the battery pack's USB port. Portable battery packs are available in different sizes with the larger packs providing more power than smaller units. To alleviate any worry of being without a charged mobile phone or tablet, an external battery pack is the answer. These devices are small enough device to always carry with you, and can conveniently recharge your phone before you need to recharge the pack.

Listed below is our range of portable USB chargers or powerbanks for mobile phones, tablets and other devices. Please click on a title for more information about that model.

Picture Item Title Item Price Buy It
Juice USB Portable Power Bank 2600mAh $29.99 plus shipping
Juice USB Portable Power Bank 5200mAh $49.99 plus shipping
Micro USB Keyring Power Bank With 8 GB USB Storage $39.99 plus shipping
Portable Power Bank 15000mAh $79.99 plus shipping



Powerbanks: What You Need to Know

Some external battery packs that have dual charging options, either two USB ports, or a USB and 2.1 Amp port. This is impressive when you can use multiple ports for different devices at the same time. Some of these portable battery packs have an indicator on the external battery pack should let you know when the unit is fully charged and how much juice is left until you need to recharge them.

Everybody needs a Powerbank or two lying around. They're one of the most handy accessories you can own in a mobile world. Today we're here to tell you what they are, why you need one, and just what exactly they're capable of.

What are Powerbanks?

Ever run out of battery of your smartphone what you're out and about? Of course you do. We all do.

They are the solution to either having your phone run out of charge, or having to plug it in, via its charger cable, to a wall socket. They're your perfect battery solution for emergencies and while travelling or on the go.

They are just like external batteries for your smartphone or tablet. You can plug your phone directly into the powerbank and charge it from there.

How Do They Work?

They work by storing up potential energy, ready for use by your smartphone or tablet. This energy is measured in mAh, or milliamp hours. This gives an idea of how much energy it can store. These devices generally run at around 70%-80% efficiency, so if you purchase at 4000 mAh powerbank, you'll be looking at squeezing around 2800-3200 mAh power out of it. In contrast, an iPhone 5 has a battery capacity of around 1440 mAh. By calculations, you should be able to charge your iPhone 5 almost twice over.

Tablets will have a greater mAh capacity, as they chew through more power. For an iPad 4 you're looking at 11560 mAh.

What are the Different Types of Powerbanks?

You can get powerbanks made specifically for your device, ala the iPhone 5 snap on battery case, or the Galaxy S4 backup battery case. You can also get more generic powerbanks, those that plug in to your device via mini-USB, or those that come with a wide range of adapters.

Generally, the more power that your powerbank can store, the larger and heavier it will be, whereas you can also get small powerbanks around the size of a lipstick, and easily slip into your pocket.

When you're purchasing a powerbank you'll need to decide what your general use will be for it. If you're going camping for a few days, you'll want to pick up a beefier device, with a bigger storage. If you are just going out for the evening, you may only need a small device that tops up half your battery.

How Do You Charge Them?

You charge your powerbank generally by a USB cord, and in some cases, you can plug them directly in to the wall.

How Long Does it Take to Charge a Powerbank?

This varies a lot from powerbank to powerbank. A good indicator of the speed of charging your powerbank is to look at the input Amps. Generally, the higher the input amplitude the quicker the charge.

How Do You Charge Your Phone or Tablet?

As mentioned before, for some devices, they have a specific charging case that will enclose your smartphone to provide extra battery when you need it. Other powerbanks have adapters that you plug directly into your phone or tablet to charge.

How Long Does it Take to Charge Your Phone or Tablet?

Similar to the time taken to charge your powerbank, you'll need to look closely at the output current of the powerbank. Generally, a higher output current (that's in amplitude again) will give you a quicker phone or tablet charge.

If you ever find yourself facing a low battery signal when you really need some juice, you'll want to pick up a powerbank. Make sure you check the mAh storage of the powerbank, the mAh storage of your smartphone or tablet, the amplitude input of the powerbank and the amplitude output of the powerbank. Doing your calculations before purchase will ensure you get the perfect powerbank for your purposes. With so many different types, sizes and capacities available there will be one to fit all your needs and your budget.

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