Laptop batteries have a relatively short service life and are really expensive to replace. There is almost no remedy to restore the capacity of the laptop battery one it is worn out. Though the actual life of a laptop battery depends on the usage habit of the laptop computer, most of the laptop users often complain that their laptop batteries no longer hold the charge and that they wanted a new one. Testing laptop battery life will help you in determining the expected life of the battery, so that you can avoid unexpected battery problem while using your laptop. You can also estimate the date for ordering a new battery.

Some of the factors such as CPU utilization and screen brightness affect a laptop battery life. The criteria that affect the battery life can be used to measure battery life of all laptops. There are many free services available on Internet and from software developers that aid in testing the status of laptop battery. Some software is available to test the laptop batteries. Some software can also estimate remaining life of the laptop battery. Laptop battery performance tests are designed to measure the expected battery life of a laptop. A battery analyzer is recommended if you need a full battery service.

Gnome Power Manager is a power management tool which can display detailed battery information of your laptop. The tool even detects and explains the problems which are responsible for causing poor performance of the battery. It also gives the details of the quantity of battery’s capacity degraded. It gives information about the original capacity of the battery in your laptop. An interesting feature of this tool is that it can give you information on the amount of power consumed by your computer at the moment.

The Cadex C7400 is a programmable battery analyzer that is capable of quick testing, charging, priming and reconditioning of the different types of laptop batteries. Lithium, nickel and lead-based laptop batteries can be quickly and easily tested using the programmable Cadex 7400 services. The Cadex C7400 analyzer uses a quick test program to measure the laptop battery health in about 3 minutes, independent of charge. The Cadex C7400 analyzer uses OhmTest program to measure the internal battery resistance.

Battery Eater is a testing tool meant to disclose the potential of a laptop battery pack. Battery Eater is a small program which can measure the laptop battery life efficiently. This software tool is used to measure the minimum operation time of a laptop under maximum workload. It heavily loads CPU, HDD, RAM, and video card while performing the test. This software tool can work efficiently in the Idle and Reader's Test mode when all power-saving options are fully enabled. This software is cost-free, and is easy and simple to use. This software uses a flexible testing scheme that uses three test modes. The software keeps track of the laptop battery performance.

The additional feature of this program is that it can show system information such as battery name, battery type and battery manufacturer, AC status, and CPU, RAM and display information. Using this program, you can test the battery life of both old and new laptops. CNET Labs' test named as Video playback battery drain test is specially designed to determine a laptop's expected battery life.