People do not usually notice small power fluctuations. Regardless, they still happen quite a lot. Your computer can be fried by major power surges like lightening and worn out when it comes to little disturbances. Desktop computers and laptop computers alike already have surge protectors, but these are no good when there is no power. This can make your computer crash or lose data, and annoying things like that. To fix this, you should get a UPS, or Uninterrupted Power Supply surge protector. The best of the best are made by American Power Conversion.
When the power goes out, UPS surge protector systems have battery power to give you some extra time to work with your computer so you can save your stuff and then turn of the computer the way it should be. APC makes several different kinds of UPS surge protectors, these include, line-interactive and online systems. They both work pretty well, although they are kind of expensive and regulate power differently.
If for some reason, you are always dealing with the ebb and flow of electrical surges, you really need the line-interactive kind of surge protector because it has automatic voltage regulation. This keeps sudden major surges in check by modifying your current as the power levels require so it stays nice and even. The only problem is that they are totally useless if you do not have any power at all.
If your power supply is mostly even, it just fluctuates a tiny bit you would be better off with the online APC battery backup surge protector because it takes your alternating current, turns it into a direct current, and then switches it back to AC again. Because it is the one that provides your current, power surges can do nothing and your electrical current should run smoothly without interruption. The main reason that online is better is because the line-interactive automatic voltage regulation system only responds to sudden surges in power, so the online APC battery backup is much better for constant, smaller power fluctuations. The only problem is how much more expensive the surge protector is because its technology is better.