Cordless Grinders

Yes, modern battery technology ensures that cordless grinders can handle all the tasks a corded grinder can. We would always recommend having a spare battery though, so that when one battery runs out you can carry on your work by attaching the spare battery to your grinder.

Yes, all cordless power tools lose power as the battery gets low on energy, because it is unable to supply the voltage the tool needs. This means the RPM of the grinder will slow down, as well as the rated power output.

Key tips to ensure your battery has a longer life is to remove it from the power tool when you notice it's output is lowering and let it sit for 1-2 hours, so that it can get back to room temperature. Then charge it and ensure it gets to a full charge before using it again in your power tool.

Yes, but this depends on the quality and power output of the battery, as well as the features of the cordless grinder. For example, having variable speed control or even a brushless motor will help to ensure that the cordless grinder performs under load, to prevent it from bogging down.