The number of cordless angle grinder is too many to count. The variations of each tool also vary widely. When it comes to the power supply the greater the voltage the more powerful the tool.
Makita has a 7.2V cordless grinder that uses a 4-inch disc that is made for the small jobs or hard to get at places. If more power is desired out of a small size, Makita also makes a 4 ½ inch disc unit that is powered by an 18 volt power supply. This more powerful grinder has a second handle near the head of the tool so extra control and pressure can be applied to the surface that is being modified.
Cable Porter
When looking at cordless grinders, the disc size can vary from ¼ inch up to 4 ½ inches. This versatility makes it possible for the right tool to be found for the right job. The power choices also vary greatly. The smallest is the 7.2 volt battery pack. This is powerful yet it is still possible to control it with just one hand. The most powerful cordless grinder on the market is the 36 volt grinder. The Dewalt line of power tools has several different models of this powerful cordless angle grinder available for the professional or home user.
When looking at this type of power tool, the battery type is relevant to the weight and life of charge. The nickel-cadmium batteries are heavier and have a short life expectancy than the new lithium batteries, but are nearly ½ the price.
Choosing the right cordless angle grinder is dependent on what life of battery, disc size, and power you will be needing to accomplish the job at hand.