1). We highly recommend you read the manufacturer'sguide book about your Dell laptop battery carefully.
  2). Clean your Dell battery’s metal contacts several weeks with a cloth moistened with rubbing alcohol.
  3). Cut down programs running in the background. Itunes, Desktop Search, etc. All these add to the CPU load and reduce battery life. Turn off everything that isn’t crucial when you’re on Dell battery.
  4). Don't put your Dell battery at extreme heat and cold place.
  5). Turn down the brightness of your monitor a great deal as it will help preserve Dell battery life
  6). Simplify the PC demands,The more you demand from your Dell laptop. Passive activities like email and word processing consume much less power than watching movies or playing a computer game.
  7). Turn off unnecessary external devices,such as bluetooth and infrared port and usb powered devices when not in use.
  8). If you use your Dell laptop as desktop pc or don't use it for a period, pls store your Dell laptop battery in a clean, dry, cool place away from high temperature and metal objects.