Alternating current, power from your electrical mains, is the best source of power for your computer. For starters, it is consistent, reliable and long lasting. Further, it is comparatively inexpensive. However, it is undeniable that fluctuationsin voltage and supply do occur. In such a scenario, you may benefit by investing in alternate power sources for your computer.Keep the following factors in mind when you are investing in alternate power sources.Why do you need it?Do you want your computer to remain powered on for a span of a few minutes so that you can save all your files and shut it down? If yes, you just need an uninterruptedpower supply unit that will make use of a small battery to power your computer until the device is shutdown. Once the few minutes lapse, the UPS will also fail and your computer’s power supply will get disrupted.You will have to wait for normal supply to be restored. The biggest advantage of using the system is that all your data will besafe. You might have spent many hours working on a single document and may be very happy with your work. However, a sudden shutdown may find your work going awry.You may have a backup copy on your computer but it certainly is not going to be up to date. Having the ability of pressing thekeyboard shortcut to save the file can make all the difference between a frustrating day and a relaxing one.How much are you prepared to spend? You can go in for a generator that provides sufficient power to run all the equipments in your house throughout the day. This generator will cost you more than all your appliances put together. It is not worthwhile either. If you want to run all your computer devices, you should opt for a generator of suitable capacity.