1. Regularly Defrag: Faster the hard drive will do its work, lesser demand you will have to place on your hard drive and battery. Make the hard drive as competent as possible by defragging it regularly (do not do this when the batteries are charging). Mac OSX itself is built better to handle fragmentation; therefore, this technique might not be work much for Apple systems.
2. Dim the screen: Most of the laptops come with an ability to dim the laptop screen. Few of them also have ways to adapt CPU and the cooling performance. If you cut those down to lowest level, you easily can press out a little additional battery juice.
3. Cut on the programs running in background like desktop search, itunes, etc: All these add to the CPU load and cut down the battery life. Shut everything down, as this is not considered advisable when your device is on the battery.
4. Cut back external devices: Wi-Fi & USB devices (including mouse) drain down the laptop’s battery. Shut them down or remove them when they are not in use. Moreover, charging other devices such as iPod, iPhone, iPad, etc with laptop battery can lessen the life of the batteries.
5. Add RAM: Adding RAM will permit you to process much more with laptop memory instead of relying on the virtual memory. The virtual memory uses hard drive and is less power proficient. Note that adding on more RAM will use more energy. Therefore, it is relevant only if you run memory exhaustive programs, which require heavy handling of virtual memory.
6. Run off hard drive instead of DVD/CD: Hard drives consume power and so DVD’s and CD’s. Having even one in the drive can be very power consuming. They take power even when they are not used. Therefore, wherever possible, try to run virtual drives using the programs rather than the optical one.
7. Keep battery contacts clean: Always clean the battery’s metal contacts every month with soft moist cloth dipped in rubbing alcohol. It keeps power transfer more efficient from your battery.
8. Take good care of the battery : Exercise your Battery. Do not leave charged battery resting for long period. After it is charged, you should at least use the battery once in 15-21 days. Also, do not let Li-On battery discharge completely.
9. Hibernate, but not standby : Though placing your laptop in the standby mode saves a little power and you instantly can resume where you just left off but hibernating it is always a better option. Hibernating your laptop will save its condition by shutting it down completely. To get back to your work where you left it, just switch on the laptop and you are there.
10. Keep the operating temperature down : The laptop operates more competently when it is kept cooler. Clean your air vents out with a keyboard cleaner or a cloth. You can also refer to some additional tips available online.
11. Establish and optimize the power options : Head to ‘Power option’ in your laptop’s control panel and then set it up to optimize power use (Choose ‘max battery’ for best effects).
12. Avoid multi-tasking : Do one thing at a time if your laptop is on battery. Instead of working on spreadsheets, e-mailing clients and listening to your newest set of MP3′s at the same time, simply set your mind only on one thing. If you do not follow this, then you will definitely drain out your battery very soon.
13. Go simple on PC demands : Passive activities like word processing and e-mailing consume much lesser power than playing a DVD or gaming. If you have single battery charge then pick your priorities shrewdly.
14. Go for more efficient laptop : The laptops are getting much more efficient as the technology is growing. Some manufacturers are offering models with batteries that can work full-day long. Selecting a newer and more efficient laptop is a quick fix to your problem.
15. Prevent Memory Effects : If you are using an extremely old laptop and you wish to prevent all the ‘memory effects’, then keep the batteries fit by charging it fully and then discharging it fully at least once in every two or three weeks. Exception to this rule is the Li-Ion battery (which most of the laptops have) which does not suffer from any memory effects.
16. Disable all intensive background applications: Apps that make intensive use of the network or processor should stay closed when the laptop is not plugged in to the socket. The peer-to-peer software such as the BitTorrent clients and the computationally rigorous applications like distributed-computing projects are out now. You also can confirm that Windows Updates and all other software updates are not attempting to download larger software patches. Disabling the automatic Windows Update function outright is too much draconian (chiefly if you forgot to reinstate features later), but at times checking on your networks usage for unexplained spike will let you to recognize and stop larger file transfers even before they gobble precious minutes of your battery’s life.
17. Plug it in whenever it is possible : One definite way to make sure that your laptop is always ready for actions is to plug it into AC outlet whenever it is possible. Keeping your machine completely charged makes probable that you will always have the battery juice that you require to complete your work. Purchase one additional AC adapter, so you have one in office and other in the laptop bag. If you frequently work at home, consider buying third adapter to keep it there.
Bonus Tip Number 1: Turn off auto save functions. Excel’s and MS-Word’s auto save functions are wonderful, but because they just keep saving usual intervals, so they work the hard drive harder than it might have to actually. If you intend to do so, you may wish to turn it again on as battery runs lower. While it saves your battery’s life in the starting, you will wish to make sure that your work gets saved whenever your battery dies instantly.
Bonus Tip Number 2: Lower the use of graphics. You can do so by changing your screen’s resolution and shutting down fancy graphic drivers. The graphics cards (or video cards) make use of same or more power as the hard disks.