110v tools routed through a transformer are typically 15% less powerful than 240v equipment. This is especially noticeable when comparing hand-held jigsaws, because the majority of a jigsaw's power is utilized to stop and start the blade on its up and down trajectory. The voltage of a typical household circuit is 120v, so using a 110v tool means that you are requiring 15% more power to perform a task in comparison to similar 240v equipment. This reduction in power can be compensated for by purchasing high-power tools, but it is important to note that higher-voltage tools are also larger and heavier than their lower-voltage counterparts. Therefore, it is best not to run any kind of power tool continuously at its maximum capacity, as this will quickly cause damage to the machine. In addition to being less powerful, 110v tools also use more electricity per hour. Household circuits average about 12-15 watts, while commercial ones can reach up to 100w or more. The more electrical outlets available, the more risk there is of someone else wanting to use one too. If you plan to be away from your house for several hours at a time, it is best to bring an extension cord with you so you don't have to keep stopping to plug in your tool. Finally, remember that if you are working with live electricity, there is always the chance of something going wrong.