How Can You Charge Laptop Without Charger. Place the connection pin from the external battery pack to the battery. I would not trust an adapter bought at a gas station or tourist stop to be able to charge your laptop (those ones are likely better for your phone).
Browse through it and improve your knowledge. In practice, this means that, when you plug a charger into a device, the charger itself and the device have a sort of “conversation”, where the phone “tells” the charger how much input voltage and current it can handle. The charger then suplies that power at the agreed voltage and current.
Some smartphone also has a reversible charger, that means you can charger laptop using a smartphone.
In practice, you can choose to buy a rechargeable power bank. However, this method is extremely slow as smartphones have a lower power output. All you’ve got to do is connect the power bank to your laptop. The charger then suplies that power at the agreed voltage and current.