Mashed Articles

Writen by Richard Romando

External laptop batteries provide the user with almost seven hours of uninterrupted power. This is a major breakthrough in this field because laptop users had to depend on normal batteries that only worked for two hours. The most important advantage that an external laptop battery offers is that the user does not have to connect his laptop to a power source every couple of hours in order to recharge the conventional battery. Therefore, an external laptop battery is the best solution.

External laptop batteries are very cheap and can be charged by an external battery charger. A laptop user can make a decision about the chemical that is used for manufacturing these batteries such as Nickel Cadmium or NiCd, Nickel metal hydride or NiMH, Lithium ion or Li-ion batteries.

The price of an external battery may vary from $120 to $200 and these batteries are available on the Internet as well as in the regular market. As computers and other related appliances are becoming cheaper, the prices of laptops are also dropping. This means that more and more people are using laptop and for longer periods. These batteries are ideal for those who want an extended power source for their laptops when they are traveling. An external laptop battery connects to a laptop through an AC adapter plug and usually have two output levels. It consists of an adapter, a chord and thirteen other connectors. Another advantage that these batteries provide is that they are universal in nature. This means that an external power battery that is manufactured by a particular company can be used with a laptop of another make and model.

External laptop batteries are revolutionizing the IT world by providing more mobility and extended power for those who want to use the laptop for more than two hours without worrying about power interruptions.

http://www.freepatentsonline.com/7419650.html

For applications in hydrogen storage and as molecular sieves short length (<1 micron) carbon nanotubes have been found to have advantages over longer tube lengths for the diffusion of gases. This patent discloses a method for producing such short length CNTs. Claim 1 reads:

1. A method for producing functionalised short carbon nanotubes with at least one open tip comprising mechanically treating long carbon nanotubes in a powder form, wherein a reactant gas able to chemically react with said long nanotubes is chosen and said long carbon nanotubes in a powder form are submitted to mechanical milling forces in the presence of said reactant gas so that short carbon nanotubes, comprising at least one specific chemical group, are obtained, and wherein said reactant gas is not air.

http://www.freepatentsonline.com/7419612.html

This patent teaches a method of making nanoporous films of polyimide which is capable of maintaining favorable properties over an extended temperature range. Claim 6 reads:

6. A method of creating pores of nanometric to micrometric size in a thin sheet of polyimide, in which the sheet is subjected to the steps comprising:

an ion bombardment;

a radiation in the visible range of a halogen light emitting at wavelengths of between 450 and 530 nm for a period of about 10 hours to one week; and

a chemical etching.