This comment is a year late but tech has changed meanwhile. Take a look at the EcoFlow River 2 basic. It's a small 7-8lb power station 300w ac output, 256wh and charges from AC in 1 hour. I've got an Alienware laptop draws 240w so I'm planning to go this route using the supplied power brick plugged into the power station. This is larger than the normal portable battery but one of the few options in the 200-300w range.
Hello, As the title says, I'm looking for a portable power bank/other type of power supply to get more lifespan out of my laptop when on the go without plugging it into a wall. However, I'd like to buy something and have it actually work (as opposed to a car cup charger I bought that works for phones but not my previous laptop). What metrics/parameters do I need to know when shopping so I know it'll actually be compatible with my laptop/laptop battery?
m17 R4, portable power bank/power supply?