, but, like all batteries, they can only last for so long. In order to maximize the amount of battery like you get out of your Dell laptop battery, you can do a few things to optimize your laptop. Optimization techniques include turning down screen brightness, making sure that unnecessary radio mechanisms are off, like Wi-Fi and Bluetooth, adjusting processor settings, and making sure that power settings are turned up so that your laptop goes into screen saver / hibernates very quickly.