With the development of mobile smart phones, more and more people would own one smart phone at least in their daily lives. It is well established that a smart phone is a mobile phone built on a mobile operating system, with more advanced computing capability and connectivity than a feature phone. The mobile smart phone need more power because they really consume power. Almost we have to charge it between 1-2 days if we own a smart phone such as iPhone or Galaxy Note . To meet the demands of those who are always on journey with Smart Phone, lots of power banks come up.
However, in choosing the best and the most recommended brands, it is somewhat difficult for us since many good products from various brands available on the market today.
After reading some research papers in blogs and reviews in amazon.com,I write this paper to introduce 5 power banks of different brands with good quality and cost-performance ration.
1.Anker® Astro 5600mAh Portable Power Bank
Specifications:
Product name:Anker® Astro Portable Power Bank
Capacity: 5600mAh
Battery Cell: Polymer
Suitable for your iPhone 4S / 4G / 3GS, Samsung Galaxy S4 / S3, audio playback, and most mobile phones.
Device type: external battery pack
input current:DC5A/1A
output current:DC5A/1A DC5A/0.5A
output current:DC5A/1A DC5A/0.5A
Average price :about $30
Features:
Compact, portable and stylish design
Easily fits into your bag to provide instant power
Perfect for long plane flights, road trips, or whenever you need to charge your mobile devices wherever you are.
Samsung Grade A cells and high quality lithiumion battery ensures reliability
Convenient flashlight updated to prevent accidental activation: lights only after pressing the power button for 2 seconds
Four LED indicators reveal the battery level
2.New Trent iCarrier 12000mAh Portable Power Bank
Specifications:
Product name:New Trent iCarrier 12000mAh Portable Power Bank
Capacity: 12000mAh
Battery Cell: Polymer
Suitable for most Apple, Android and Windows Smartphone's and 5V Tablet, goPro, GPS, portable game consoles, etc.
Device type: external battery pack
Input: 5V/1.5A
Outputs: 5V/2.1A and 5V/1A
Average price:$40
Outputs: 5V/2.1A and 5V/1A
Average price:$40
Features:
Charging your phones and tablets faster than any other brands of external battery.
Charging your phones and tablets faster than any other brands of external battery.
Built to Last
Sturdy build, fingerprint-resistant black matte finish, simple portable design,
Sturdy build, fingerprint-resistant black matte finish, simple portable design,
No increase charge time when charging two devices.
Dimensions: 3.9 x 3.6 x 1.1 inches
3.YooBao YB-651 13,000mAh Thunder Power Bank
Specifications:
Product name: YooBao Thunder power bank, Model: YB651
Suitable for mobile phones, iPhone, iPad, cameras, Htc, Samsung, Blackberry, Nokia, PSP/NDSL, MP3/MP4 players ,etc.
Capacity: 13,000mAh
Battery Cell: Polymer
Device type: external battery pack
Input: 5V DC, 1,000mA
Output: 1,000mA and 1,500mA
Color: Black
average price:about$60
Product name: YooBao Thunder power bank, Model: YB651
Suitable for mobile phones, iPhone, iPad, cameras, Htc, Samsung, Blackberry, Nokia, PSP/NDSL, MP3/MP4 players ,etc.
Capacity: 13,000mAh
Battery Cell: Polymer
Device type: external battery pack
Input: 5V DC, 1,000mA
Output: 1,000mA and 1,500mA
Color: Black
average price:about$60
Features:
Slim and easy to carry
High capacity, rechargeable, and universal power pack
Keep talking and keep playing longer
Five LED indicators show battery's real time capacity
Elegant and executive design make it looks fashionable and smart.
Slim and easy to carry
High capacity, rechargeable, and universal power pack
Keep talking and keep playing longer
Five LED indicators show battery's real time capacity
Elegant and executive design make it looks fashionable and smart.
4.Sony Xperia Z Ultra XL39h 5000mAh Portable Power Bank Charger
Specification:
Product name:Sony Xperia Z Ultra XL39h 5000mAh Portable Power Bank
Stand function support
Capacity: 5000mah
Stand function support
Capacity: 5000mah
Battery Cell: Polymer
Charging time: around 3-5 hours
Input : 5V/0.5A
Output: 5V/0.8A
Charging time: around 3-5 hours
Input : 5V/0.5A
Output: 5V/0.8A
Average price :about$29
Features:
Ultra-thin design and perfect dimensions
Ultra-thin design and perfect dimensions
Led indicators for power balance
Very light and convenient to carry
Easy installation and removal
Stand support
Flip cover
Works as both an extended battery set and a protection case.
External battery charger case for Sony Xperia Z Ultra XL39h
Very light and convenient to carry
Easy installation and removal
Stand support
Flip cover
Works as both an extended battery set and a protection case.
External battery charger case for Sony Xperia Z Ultra XL39h
5.Samsung Universal USB 9000mAh power bank
Specification:
Product name:Samsung Universal USB 9000mAh power bank
Capacity: 9000mAh
Battery Cell: Polymer
Suitable for：Smartphones ,Tablets and any device supporting USB charging
Charging time: around 3-5 hours
Charging time: around 3-5 hours
Device type: external battery pack
Input : 5V
Output: 5.2V
Average price:
Average price:
Features:
Provides up to 3 full charges on your Samsung smartphone and more than 1 full charge on your Samsung tablet
Easily fits into your bag to provide instant power
The power banks listed above are good products with reasonable price.Yesterday, some person who is professional in this field answered me a question I asked in yahoo.They told me that Anker and New Trent are the most efficient ones ,the reason why they say "efficient" because there are knock off out there claiming to have a 15,000mah capacity, but because it's not efficient at transforming the power from the battery to the phone, most of these knock off's will probably get on 40%-50% efficiency. While the Anker and New Trent can get it to 70% efficiency.
As far as I can consider,the power banks you wanna buy depend on your actual demand. You could go and buy a power bank at best buy for $100 that has 10,000mAh of power or you could buy one on amazon for $40 that has the same amount of power but some unfamiliar brand.
source from:http://sellelectronicgood.wordpress.com
