The first thing you run into when you want to buy a coffee grinder is whether to choose a manual or an electric coffee grinder. Choosing a coffee grinder depends on how you make coffee. A manual coffee grinder is recommended, for example, for a coffee maker, pour-over or for a cafetière. You can conveniently take a manual coffee grinder with you anywhere, so you can grind fresh beans even while camping. In fact, you can just use it when you have no electricity at your disposal.
The electric coffee grinder is recommended when you have an espresso machine or percolator. This is because an electric grinder is able to grind the coffee beans more finely. Moreover, the beans are ground more evenly with an electric coffee grinder. At least, when you have a grinder with grinding discs. When coffee beans are ground unevenly, it causes uneven extraction. As a result, not all of the aromas are extracted from the coffee beans, which, of course, is a waste.