Universal laptop charger are suitable for different brands and types of laptops. Think of USB-C chargers or universal charger with exchangeable connectors. There's always a suitable charger for your laptop. You can use these universal chargers as your standard charger if the one included with your laptop breaks, for example. It's also useful to have an extra charger as a spare if your travel often or work in different locations. That way, you always have a laptop charger with you.