Electric Grinders

Corded grinders are able to deliver a consistent power output because there is no battery. As a battery loses power in a cordless grinder, it is unable to supply the voltage the tool needs, which means the RPM of the grinder will slow down, as well as the rated power output. This isn't an issue if you have multiple batteries, but if you want to concentrate on the job at hand and know that your grinder is delivering consistent power, then you will need an electric grinder.

Current battery technology means that cordless grinders are nearly just as powerful as electric grinders. However, as battery power fades and the battery cannot provide the voltage the grinder needs, a cordless grinder will not provide the same power it did when the battery had more charge. Whereas an electric grinder is able to provide consistent levels of high power for as long as the operator requires.

They are not necessarily easier to use, as they will both share similar functionality. However, an electric grinder does not need a battery, so will usually be lighter and more balanced in the hand of the operator. However, if an even lighter grinder is required then you may need an air grinder, which doesn't have as many internal parts to it as an electric of cordless grinder and so has a lower weight.