Powering through powerbank

I know i can charge the laptop with a powerbank, but its possible to use the powerbank to run the laptop with no battery, just the PB running like it was the laptop battery? That one in the link: https://www.amazon.com/gp/product/B09N3PRJZK/ref=ox_sc_act_title_3?smid=A3AOI0INZQJ8QV&th=1

yes but you would obviously be limited to the external battery capacity and since the laptop will believe its on wall power, it’ll throw efficiency out the window

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Thanks for the answer, i figured something like that would happen, i just wanted to know if its possible, in case i have to power it for something urgent and didnt have a working wallpower near, even that it is not working on full power.