Digital battery

Researchers at the Uppsala University in Sweden have developed a new thin-film battery made from salt and cellulose. This salt and paper battery uses a thin-film which makes it an attractive feature for many portable devices that draw a low current. It can be used in many low-power devices, such as wireless sensors, smart cards, medical implants and RFID tags.

The cellulose is derived from a polluting alga found in lakes and seas. The alga’s walls contain cellulose that has a different nanostructure, which gives it 100 times the surface area. The lightweight, rechargeable battery is made by coating the paper, made from this cellulose, with a conducting polymer, and inserting a salt-solution-soaked filter paper between the paper electrodes.

In comparison with a lithium battery that would take 20 minutes to recharge, this new battery can be recharged in tens of seconds because the ions flow through the thin electrode quickly. The salt and paper battery will be made available to distributors in about three years. For the moment it is still in the early stages of development.

A digital camera battery is probably the most important digital camera accessory. Some digital cameras can consume power at an incredible rate, providing only a few hours of continuous shooting time before the battery is exhausted. Other cameras are famous for the long life of their digital camera battery which allows users to snap away with barely a thought to power consumption. It is important to know how you plan to use your camera and what kind of battery it needs.

There are two types of Digital Camera Battery. The most widely available digital camera battery is a standard AA-size battery. The other type is a rechargeable battery that is made by the manufacturer, otherwise known as a proprietary battery.

A proprietary digital camera battery offers the advantage of being lighter and more compact, but they are often more expensive, making the prospect of buying one or two backup sets much less appealing.

The alkaline AA-size digital camera battery usually has a very short life - less than an hour in extreme cases - when used in a digital camera. This type of battery makes an acceptable emergency backup, especially if you are travelling with your camera. However, the Nickel Metal Hydride (NiMH) digital camera battery can be used instead of the alkaline ones with a Charger and this rechargeable digital camera battery has a substantially longer life at an affordable price.

Another type of AA-size battery is the non-rechargeable Lithium A1045 batteries and rechargeable Nickel Cadmium (NiCD) batteries. The lithium digital camera battery has a superior life to alkaline AA’s and offers good cold-weather performance but their price and non-rechargeable feature make them less useful than rechargeable NiMH batteries. It is also important to ensure that your camera can take a lithium digital camera battery. On the other hand, the NiCD digital camera battery offers the advantage of retaining their charge while unused, unlike NiMH cells, but have shorter lives and need to be discharged completely before recharging which could be very inconvenient.

The LCD screen of a digital camera is responsible for consuming the most power, so it is worth only using the LCD when necessary to help save the battery life. Always try to carry at least one backup set of batteries, especially if you plan on being away from power outlets for an extended period of time. The current alkaline AA-size battery can make a convenient emergency backup if your original digital camera battery fails.

      Cornell University researchers have utilized carbon nanotubes to replace the traditional silicon tube, to produce highly efficient solar cells.

      Solar cells now are more popular than lithium batteries like Camera Battery, Camcorder Battery. The key of this technology is to use carbon nanotubes to replace the traditional silicon tube to produce photodiodes, which are basic components of solar cells. Researchers study the diodes by using different colors of laser and found that in the process of conversion of light energy into electricity, it can double current intensity.

      The researchers said carbon nanotube is an ideal photodiode, because it can take full advantage of excess light energy, whereas the excess energy in the traditional solar cells often loss in the form of heat.

      The study was published in the U.S. “Science” magazine online edition. Papers first author, graduate student of Cornell University Nathan Gabor, said: “We not only find a new material, but will put it into application and make real solar cells.”
 
      However, the researchers pointed out that they currently only produced a highly efficient solar battery in the laboratory, but mass production of cheap and reliable next-generation solar cells need to conduct more in-depth study.