Almost every power tool comes in a cordless version. In simple terms that just refers to the tool not having an electrical lead. With this type, a battery is used for the power.

With this type, the distinct advantage is that you will always have a constant power source to drive the motor. The disadvantage is that you will always need an electricity supply, and you will always have a trailing lead. They will, however, not run out of power and you wont have to wait if your battery isn't charged up. You can buy an angle grinder that is known as a "Bare Tool." Essentially this is any type of power tool, that does not come supplied with a battery.If the tool is faulty within 30 days of buying it, we will arrange for its collection at no cost to you and supply a replacement. They are also cheaper than a cordless option. I am a big fan of cordless tools but if you have a full days work or if it's a heavy duty job then sometimes a corded model is better. Cordless Angle Grinder

the tool is not an Air Compressor/ Air Tool, a Battery/ Charger, an Accessory, or a Petrol or Production Tool These will run off a battery, typically an 18 Volt battery. Most cordless angle grinders are sold as a bare tool only, so no battery is supplied. That is ideal if you already own a branded tool battery. They battery can be quite heavy and this usually makes this type harder to use for long periods than the corded models.

Technical specifications

These are really only useful, if you own other power tools in a particular brand line. If for example you owned an 18 volt Dewalt drill, then you could use the same battery and charger with your new bare tool Dewalt angle grinder.