Fist check if your Dell is under warranty. If it is you might be able to get one for free through the company. If not go into Best Buy and ask an employee where they are located.
Batteries plus carries all the brands of laptop batteries, the only thing is dell would be cheaper.
Laptop battery life depends on a variety of factors. Typcially Dell has higher rated batteries.
Dell has a rigorous qualification procedure by which all Dell batteries are validated to make sure proper function, performance and safety. Some non-Dell batteries are offered in the market place with claims of compatibility with Dell systems. Dell can not verify these claims, nor the safety of making use of them inside a Dell program. Dell strongly encourages our customers to utilize only Dell laptop batteries advertised as appropriate for their laptop model. Only Dell laptop batteries come with a 1-year warranty, are engineered for optimal safety and performance for Dell systems, and are supported by Dell technical assistance for the length with the warranty period.
A good place to find replacement batteries for Dell laptops is eBay. It is possible to find batteries for less than $10, but they might not last as long as Dell-manufactured batteries.
Dell laptop power cords are generally only compatible with Dell laptops, as each brand of laptop has its own specifications for batteries and power cords.
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From the Dell website
Extra laptop batteries can be bought straight from the maker of the laptop or from the stores they are sold in such as Best Buy and Officemax.
batteries who manufacturer by the companies like dell ibm or acer depends on the company or compatible batteries from china
yes, alienware is owned by dell
One can purchase Dell 700m batteries from Dell's own official webshop. Other options are to buy the batteries from Amazon or eBay. One can also find special websites focusing on batteries like "laptops-battery-online"
One can purchase laptop batteries from retailers such as Bing Lee Electronics, Dick Smith Electronics, Harvey Norman and PC World. One can also purchase online from sites such as Dell, Best Buy and Office Depot.