Meind 100W Laptop Adapter M505A is multi-function, very convenient for taking around, Manufactured with high quality. Multi Tip & Voltage 90w Laptop AC charger with multi connectors, more convenient and high efficiency. Plug and play, easy to use with automatic voltage adjustment. You can power your different brand laptops with just one adapter
How to Know Your Laptop Power Watt and Voltage?
Usually, there will be a specification paper pasted on the back of your laptop that include required input voltage and amps.
Laptop Power Watt = Required Input Voltage x Current Amps, eg, 19v x 3.42a = 65w