When it comes to testing Dell Inspiron 6400 battery, there are a number of vital aspects that you need to be aware of. Basically, there are plenty of different ways of testing a Inspiron 6400 battery. All you have to do is to conduct a little research online to be able to find out what others are doing to test their laptop batteries. No matter what method you choose to test your laptop battery, you have to have something running. A lot of people tend to have this misconception that they can just turn on their laptop and leave it there. This is not the way you should go about the laptop battery testing. In order to properly inspect or evaluate your Dell 6400 battery, your notebook needs to be running something, and it certainly helps if it's using CD ROM drive as well. The more activities that it has performing on it will give you a better understanding of how good your laptop battery is at holding the charge. Once you are done with the testing of the battery, you will be able to determine whether you can keep the existing battery that you already have, or if you need to go for a new one. When you decide to opt for a new Dell 6400 battery, make sure to fully charge the battery before using it for the first time. Otherwise, it would only damage your battery.
If you do not have time to look for a possible solution over the Internet, you always have the option to run this test on your Dell laptop battery. Pick up a music CD and insert it into the CD ROM drive. Allow your laptop to play this CD for about an hour at least. To have clear idea of how good your laptop battery is, make sure that the screen saver does not show up for an hour or so. After playing for a period of about an hour or so, your battery should have at least 70 percent of charge. If it has lost more than that, your battery may be undergoing some degradation. If this is the situation, then your battery is not in the right state, and might undergo further degradation over time. It will, ultimately, force you to keep your adapter plugged all the time. When it happens, it is not much different from that of a desktop.
With that said, this is just one of the many tests that you can perform on your Dell Inspiron 6400 battery. No matter which type of test you run on your battery, but, at least, you should run something on it to gauge its capabilities. When you do this, you find out if your Dell Inspiron 6400 adapter is ready for use. When you are using this type of battery, its behaviour can't be predicted. You may not want yourself to be in such kind of situations. So, inspect your Dell 6400 battery thoroughly to ensure that your laptop computer is not going to cut off during some important work.