Or else you may easily miss 1 line you do not need and get the result which DrStrangeprk outlined. Unstable power won't matter much when addressing an incandescent light-weight bulb or an area heater. But although the power rarely goes out, we advise you get a UPS for the Laptop https://googlesites70470.azzablog.com/33993153/uninterruptible-power-supply-system-an-overview