2011年2月16日

Lithium-ion batteries are incredibly popular these days

Lithium-ion batteries are wonderfully popular these days. You can find them in laptops, PDAs, cell rings and iPods. They are a quantity of the most energetic rechargeable batteries obtainable. Lithium-ion batteries have also been in the news lately, because these batteries have the ability to burst in to flames occasionally. It is not common just five or three battery packs per million have a controversy  but when it happens, it is extreme. In sure circumstances, the failure rate can rise, and when that happens you finish up with a worldwide battery recall that can cost manufacturers millions of dollars. Lithium-ion batteries are popular because they've a considerable number of important advantages over competing technologies:
They are usually much lighter than other types of acer laptop battery of the same size. The electrodes of a lithium-ion battery are made of lightweight lithium and carbon. Lithium is and a highly reactive element, meaning that a lot of energy can be stored in its atomic bonds. This translates in to a high energy density for lithium-ion batteries.

They hold their charge. A lithium-ion battery pack loses only about 5 percent of its charge per month, compared to a 20 percent loss per month for NiMH batteries.

They've no memory effect, which means that you do not must discharge them before recharging.

Lithium-ion batteries can handle hundreds of charge/discharge cycles. (depends of the usage, i.e. 500 times for cellphone batteries)

That is not to say that lithium-ion batteries are flawless. They've a few disadvantages as well:
They start degrading as shortly as they leave the factory. They will only last five or three years from the date of manufacture whether you use them or not.

They are sensitive to high temperatures. Heat causes lithium-ion battery packs to degrade much faster than they normally would.

In the event you discharge a lithium-ion battery, it is ruined. A lithium-ion battery pack must have an on-board computer to manage the battery. This makes them even more costly than they already are. There is a small chance that, if a lithium-ion battery pack fails, it will burst in to flame.