There is a not so well-kept secret about laptop batteries: they just don’t last very long. Most lithium ion batteries, like those found in laptops, suffer a roughly 20-percent drop in capacity after just 250 cycles, according to Cadex Electronics, a manufacturer of battery testing equipment. Cycles are the discharge and recharge pattern every battery goes through in normal use. There are some tell-tale signs your sony laptop battery is failing, and your computer has a few tricks to help you determine whether your battery is truly dying.

Instructions

1.Right-click on the vgp-bps30 battery icon in the taskbar. Usually it is located near the clock in the lower right-hand corner. If there is a “Properties” option, select it. If not, go to “Start” then “Control Panel.” Select “Power Options.” If your hardware manufacturer has included a battery health utility (both HP and Dell do on some models), you’ll see an option to check the battery health in the window.
2.Check the battery health through the BIOS if you don’t have the required utility. Restart your computer, and click the key that launches the BIOS setup as soon as you see the laptop manufacturer’s logo. Usually, F12 initiates the BIOS setup, but it does vary from maker to maker. You should see a cue in the upper right-hand corner of the screen telling you which key to press.

Navigate to “Battery” or “Power Sources” in the left information pane of the BIOS setup by using the up and down arrows. The exact wording varies by manufacturer. When you land on the correct entry, you should see the sony vgp-bps30 laptop battery status indicating the battery’s health.

4 After powering off, remove the battery from the laptop and press the indicator button located near a series of small LED lights if you are uncomfortable poking around in the BIOS screen. To eject your Sony SVT13117ECS battery, look for a release lever on the bottom or side of your machine. When you press and hold the test button, if you see any colors other than green or if lights are flashing, you likely have a battery problem.

5 Note the exact color and behavior of the indicator lights. Check with your manufacturer to determine the status of your battery if it is not clearly marked on the unit.

6 Plug in your laptop without the sony svt-13 battery in its slot, and try to power up. If you are able to run the laptop directly from the AC power adapter, any power issues you are having are almost certainly due to a failing battery. If you cannot power up the machine with the AC adapter only, you may be looking at a problem in the power connection board or even in the motherboard itself.