Sony released a new water resistance,wearable Walkman “NWZ – W250″ . This tiny piece is available in 2 GB and 4 GB capacity models and apparently boasts  11 hour long battery life.

This weighs up to 43 grams and is available in 4 different colors(black, silver, lime green and magenta).You can pick one or more of these models at about 60US$.

All those devices require a steady stream of power to keep the system going. Now there are a number of backpacks that take advantage of the most powerful and reliably consistent source of power available: the sun.

Solar-powered backpacks not only store the devices that so many of us have come to rely on, they also power them to ensure uninterrupted coverage no matter where you are.

Understanding the technology

Solar power isn’t the stuff of some Jetsons-like future land. It’s a relatively simple technology that has been mastered for limited use — and is being studied for more widespread and powerful use.

Solar energy uses photovoltaic cells to college light from the sun and convert it into energy. Silicon is often the semiconductor of choice.

Solar-powered backpacks utilize solar panels attached to the outside of the pack in order to charge cell phones, PDAs, MP3 players or even laptops. But the panels are lightweight and waterproof, making them practical, as well as useful.

Solar-powered backpacks can produce up to four watts of power. Some higher-end models can produce up to 15 watts. One hour of direct sunlight is enough to power a cell phone for about an hour and a half or an iPod for three hours. But solar-powered backpacks also use a lithium-ion battery to store energy, allowing for up to 55 hours of stored energy. A handy tool for those cloudy days!

The market

There are a variety of solar-powered backpacks on the market, and they range in price from $75 to $500.

Voltaic, Tonino Lamborghini and Eclipse all have models.

Features of some backpacks include a variety of adapters for different cell phone models and a USB plug for MP3 players and other devices.

Some models even hook up to a travel charger or a car charger to give an extra power boost.

The bags can be work as backpacks or slings, and they can fit up to a 15″ laptop and are padded for protection. The bags feature compartments for various other electronic devices and their cords for organization.

And there’s no need to sacrifice style for convenience and technology: These bags come in a variety of styles, from a typical backpack design to a messenger-bag style. They are stylish and sleek, and are built to meet all of your needs.

This guest post is contributed by Maria Rainier, she writes on the topic of online degrees . Email her at: mariarainier@gmail.com

The prototype is comprised of three main components

1. Camera( logitech QuickCam)
2. Pocket projector ( 3MMPro110)
3. Laptop computer

Have a look at the video

• Too expensive: Forget the fact that Apple’s products are overhyped and overrated – if I were to include these reasons on my list, people would say I was prejudiced and biased and actually envious of the company’s “impressive” track record in the sales and publicity department. The bottom line is that all gadgets that have names prefixed with the letter i are overpriced, sometimes even costing double what a competitor’s product costs. To illustrate further, an iPod nano with a 2.2 inch screen costs around $150 while a similar MP3 player from a reputable competitor with a larger screen and more features costs just one third of this.
• Not standardized: Ever tried copying your songs from your iPod to your computer or to any other MP3 player? If you have, you would have racked your brains to find where and how your songs have been stored. Apple does not allow you to move your songs easily because they believe in copyrights and licences, right Mr. Jobs? Well, any product that is not standardized to interact with other gadgets is just not my cup of tea.
• Lack ordinary features: The iPod has no microphone, FM radio, or recording facility and cannot be used as a mass storage device like most other MP3 players of its calibre. Also, there was no support for MMS or video on early iPhones and  early models of the iPod did not feature a Search option. The latest product from the house of Apple, the iPad, lacks video playback or the ability to multitask, and it also does not feature a USB port or a camera, all of which are pretty much the norm for any gadget today.
• There is less tech support: So you claim your Mac is much more superior to the lowly PC with its horrid Windows OS, but if anything does go wrong, how much tech support do you have? With the more popular Windows OS, every Tom, Dick and Harry in tech support can talk you through a troubleshooting session blindfolded and with their hands tied behind their backs. A Mac on the other hand is a killer when it comes to figuring out why your screen just went completely black.
• Feature instant upgrades: Why buy Apple today when you’re going to be hit in the face a month or so later with an upgraded product that is much cheaper than the one you were suckered into buying? Ask any Apple gadget owner with a grouse and they’ll tell you their story. It makes no sense to hype your product, get customers to buy them, and then revamp it almost immediately and bring down the price just because your sales figures are poor.

So yes, even though my Windows may crash at times and I curse Bill Gates and Microsoft, there’s just no way I’m going the Apple way.

By-line:

This guest post is contributed by Barbara Williams, she writes on the topic of Computer Technician Programs . Email her at:  barbara.williams07@gmail.com .

No Support To Flash Player: iPad doesn’t support Flash player, so you will not be able to play most of the videos online or play games which uses flash. Of course it will let you play YouTube videos. As many of the websites uses flash player to view their content, this can be a big drawback.

No Multi-tasking: One of the big disadvantage of iPad is its nonexistence of multi-tasking. Multi-tasking is one of the key future of the modern day devices, iPad’s nonexistence of multi-tasking gets me amazed. So, if you are playing a game and quickly want to browse a website, then the only option you have is: to close the game application and browse. That means you cannot let your application run in the background.

Lack Of Webcam: Yet another strong disadvantage of iPad. Its so hard to believe that the device developed for the people who like browsing doesn’t support video conference. You cannot use webcam while using instant messenger. It will not let you grab a picture for your personal blog.

No USB Support: Universal Serial Bus which is suppose to be big breakthrough in the technology, is not supported by the iPad. Almost all of the peripheral these days are connected to devices through USB. So, no USB drive, USB headset and USB related stuff.

Other Drawbacks: Apart from these disadvantages iPad have many more drawbacks:

• iPad reads e-book but doesn’t have e-ink, the one which make the screen look like real page of a book.
• Supports only application from Apple App Stores.
• No external memory slot

Price tag is much high

With all these disadvantages, the thing that comes to my mind is: “iPad is marketing 2G”. iPad certainly  not a 3G device.

Pingo is probably the  coolest gadget ever for all the Facebook  addicts. Basically pingo is a robot which can be integrated with your Facebook account through a Facebook application which let you give name to this robot, set its mood, profile and manage its daily life. Pingo the robot is tiny and come with an internal speaker, microphone, proximity sensors, ground sensors, two small wheels for its motion and two little dazzling LED eyes.

Here is what the little pingo does:

• Access your Facebook account via Facebook application.
• Get your friend’s updates
• Can be played and loved by sending gifts with Facebook gift page
• Reads newspaper from any site or blog
• Get weather forecast
• Can sing you tune
• Receives alerts from email account

• Can be played by shaking, poking and scratching it

Pingo is cute, lovable, adorable, interactive Facebook friend.Call it a pet or a robot but this is surely a cool gadget a geek would like to have.

Here is a video demonstrating how it works.

Well, after a long month of busy schedule, we have resumed our work  to provide our visitors with the latest gadgets in the geek world. Since the gadget field is a vast area, we have now  decided to provide our visitors with only those gadgets that can be useful to our visitors or which create a buzz in the gadget world. Hope you like our work and continue to support us in the future.

- gadgetcastle.com Team

Here is a video which shows the preview of some of the themes.