Most Dell battery LED indicator that allows users to see how much running and what the total life of the battery are available at the touch of a button.

For the battery, press, and the amount of light will appear the state of the load. If you see any lights, you have a fully charged battery. Any light that appears accounts for approximately 20% charge.

To battery health, hold the button on the battery at least 3 seconds. If no lights appear, the battery is in good condition and approximately more than 80 percent of its original charge capacity remains. Each light represents a gradual degradation. If five lights appear, remains less than about 60 percent of the charge, and you should consider replacing the battery.