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.