As we know, the life of notebook battery is usually long. It is one of the notebook accessories which are seldom broken. Sometimes, the notebook battery still works well after some other notebook accessories are broken. But once the notebook battery is broken before you plan to change your notebook for a new one, you need to cost some money to buy a new battery. It is not cheap as a notebook AC adapter. You may feel a little disappointed. But if you get one which work very well with your notebook after you cost much of your money, you may feel better.

How to choose the exact notebook battery for your notebook? We will give you some advice as following.

First, you need to check the damaged notebook battery carefully, especially the information on the back to get some useful information. And please write down the following information:
a. the part number of your original old notebook battery
b. the capacity of your original old notebook battery
c. the voltage of your original old notebook battery

Second, to find the exact notebook battery you need, you need to check your notebook and the paper information you got when you buy your notebook and try to find out the model of your notebook.

Third, you can have a search on the Internet with the above information, such a title as Dell Inspiron 6400 notebook battery (with the notebook model) and PA-1650-02 ac adapter (with the part number of the notebook battery).
After you find some websites, please check the details carefully to make sure the capacity and the voltage are the same to your original old notebook battery.

If all the information is the same to your notebook and your original old notebook battery or compatible with your notebook model and your original old notebook battery, that item is the exact battery for your notebook.