How to Choose a Laptop Battery?
 

Every laptop company has different batteries, and many laptop companies have different batteries for different models,such as:
http://www.batterij-adaptor.com/img/...20-battery.gif . So how to figure out which is yours? Well, you could buy it directly from the company, which means you'll probably pay a serious premium (Dell, for example, has been known to charge four times more than ones you can get elsewhere). Unless you have to, why pay more?Any suggest is welcome.

Get the model number of the battery you need. If you're simply restoring electric battery, just gaze at your old one, and it should be there. If not, log onto the manufacturer's website and look up your model.

You have to buy a new battery designed for your machine. Search for replacement battery by notebook type.

You need to check whether it is 6 cell or 9 cell battery just for better timing