Can I convert the hard drive of my computer to an external hard drive? How can I do it?

My Nintendo DS is charging abnormally. The red light, which normally lights up when charging, sometimes is not lighting. Also, it took me longer time to charge and I think the battery drains even quicker that usual. What can I do to determine the problem?

Where can I download free E-books for my Kindle? All I see are in PDF format which cannot be read in Kindle.

It was said that Sony already acquired Gaikai, the cloud gaming company. Gaikai makes games that are accessible online through the cloud service. How would this change the whole gaming experience that Sony is well known for? Would this mean that Sony will stop creating those video game consoles and gamers could access games without the need of Sony's game controllers?

I just recently acquired my Huawei MediaPad. It was okay at first until one time when I was playing some games, it suddenly crushed. I tried turning it on but nothing happens. A few more try before it actually turned on. This always happen when I’m playing some game and the turning on problem also comes after that. What could I do to fix this?

After installing new games to my Sony Ericsson Xperia Play, it suddenly became slow when using it. Sometimes it even hangs.  I decided to uninstall the games but it’s still the same. How can I revive its normal functionality?

New tablet has been launched into market by Karbonn mobiles they named it as Smart Tab 1. What is the price of this tab ? How is it different from other Android tabs?

I'm planning to buy an external hard drive for my office files. What are the things I should consider in buying one?

Are there things I need to know and remember?

Thanks.

Cascadia Games has this GameDock where you can connect your iPod, iPhone or iPhone to a television and retro game controllers. Does this work with all games available  that would, of course, need the controllers?

I came across an article that researcher have created a system wherein you can type words just by thinking it.  Can this also help doctors verify patients whose body are already dead but still have a functioning brain and probably get answers from them?